diff --git a/package-lock.json b/package-lock.json
index 1bcb7e1..2cb316f 100644
--- a/package-lock.json
+++ b/package-lock.json
@@ -1295,6 +1295,11 @@
       "resolved": "https://registry.npmjs.org/destroy/-/destroy-1.0.4.tgz",
       "integrity": "sha1-l4hXRCxEdJ5CBmE+N5RiBYJqvYA="
     },
+    "dialog-polyfill": {
+      "version": "0.4.9",
+      "resolved": "https://registry.npmjs.org/dialog-polyfill/-/dialog-polyfill-0.4.9.tgz",
+      "integrity": "sha512-iM4ZXRLOA/qpbW6XznGOq7Iq58JoXhZGo+OMG8K3wFxvIatnMTnIancLGEKa6WYy6oTkndfb2UXQ6FGtoUBn1g=="
+    },
     "diffie-hellman": {
       "version": "5.0.2",
       "resolved": "https://registry.npmjs.org/diffie-hellman/-/diffie-hellman-5.0.2.tgz",
diff --git a/package.json b/package.json
index be78e0a..55855d0 100644
--- a/package.json
+++ b/package.json
@@ -20,6 +20,7 @@
     "concurrently": "^3.5.1",
     "cross-env": "^5.1.3",
     "css-loader": "^0.28.7",
+    "dialog-polyfill": "^0.4.9",
     "express": "^4.16.2",
     "extract-text-webpack-plugin": "^3.0.2",
     "fg-loadcss": "^2.0.1",
diff --git a/routes/_components/Media.html b/routes/_components/Media.html
index c4d3853..725f598 100644
--- a/routes/_components/Media.html
+++ b/routes/_components/Media.html
@@ -2,12 +2,19 @@
   {{#each mediaAttachments as media}}
   <div class="status-media-container {{hasNoNativeWidthHeight(media) ? 'no-native-width-height' : ''}}">
     {{#if media.type === 'video'}}
-      <video poster="{{media.preview_url}}"
-             src="{{media.url}}"
-             width="{{getSmallWidth(media)}}"
-             height="{{getSmallHeight(media)}}"
-             controls
-      />
+    <button type="button"
+            class="play-video-button"
+            aria-label="Play video"
+            on:click="onClickPlayVideoButton(media, getSmallWidth(media), getSmallHeight(media))">
+      <div class="svg-wrapper">
+        <svg>
+          <use xlink:href="#fa-play-circle" />
+        </svg>
+      </div>
+      <img src="{{media.preview_url}}"
+           width="{{getSmallWidth(media)}}"
+           height="{{getSmallHeight(media)}}" />
+    </button>
     {{elseif media.type === 'gifv'}}
     <video
            poster="{{media.preview_url}}"
@@ -59,11 +66,40 @@
     max-width: calc(100vw - 40px);
     object-fit: cover;
   }
+  .play-video-button {
+    margin: 0;
+    padding: 0;
+    position: relative;
+    border-radius: 0;
+    border: none;
+    background: none;
+  }
+  .play-video-button .svg-wrapper {
+    position: absolute;
+    top: 0;
+    left: 0;
+    right: 0;
+    bottom: 0;
+    display: flex;
+    align-items: center;
+    justify-content: center;
+    z-index: 40;
+    pointer-events: none;
+  }
+  .play-video-button svg {
+    width: 72px;
+    height: 72px;
+    fill: var(--mask-svg-fill);
+    border-radius: 100%;
+    background: var(--mask-opaque-bg);
+  }
 </style>
 <script>
   const DEFAULT_MEDIA_WIDTH = 300
   const DEFAULT_MEDIA_HEIGHT = 200
 
+  import VideoDialog from './VideoDialog.html'
+
   export default {
     helpers: {
       getSmallWidth: media => media.meta && media.meta.small && typeof media.meta.small.width === 'number' ?  media.meta.small.width : DEFAULT_MEDIA_WIDTH,
@@ -72,6 +108,24 @@
     },
     computed: {
       minMediaWidth: (mediaAttachments) => Math.min.apply(Math, mediaAttachments.map(media => media.meta && media.meta.small && typeof media.meta.small.width === 'number' ?  media.meta.small.width : DEFAULT_MEDIA_WIDTH))
+    },
+    methods: {
+      async onClickPlayVideoButton(media, width, height) {
+        let dialog = document.createElement('dialog')
+        dialog.classList.add('video-dialog')
+        document.body.appendChild(dialog)
+        let videoDialog = new VideoDialog({
+          target: dialog,
+          data: {
+            poster: media.preview_url,
+            src: media.url,
+            dialog: dialog,
+            width: width,
+            height: height
+          }
+        })
+        videoDialog.showModal()
+      }
     }
   }
 </script>
\ No newline at end of file
diff --git a/routes/_components/VideoDialog.html b/routes/_components/VideoDialog.html
new file mode 100644
index 0000000..644ab33
--- /dev/null
+++ b/routes/_components/VideoDialog.html
@@ -0,0 +1,80 @@
+<div class="video-dialog-wrapper">
+  <div class="close-video-button-wrapper">
+    <button class="close-video-button" aria-label="Close video" on:click="onCloseButtonClicked()">
+      <span aria-hidden="true">&times;</span>
+    </button>
+  </div>
+  <video poster="{{poster}}"
+         src="{{src}}"
+         width="{{width}}"
+         height="{{height}}"
+         controls
+  />
+</div>
+<style>
+  :global(.video-dialog) {
+    position: fixed;
+    top: 50%;
+    transform: translate(0, -50%);
+    background: #000;
+    padding: 0;
+  }
+  :global(.video-dialog-wrapper) {
+    display: flex;
+    flex-direction: column;
+    align-items: center;
+    justify-content: center;
+    max-width: calc(100vw - 40px);
+  }
+  :global(.video-dialog video) {
+    max-width: 100%;
+  }
+  .close-video-button-wrapper {
+    text-align: right;
+    width: 100%;
+    background: var(--nav-bg)
+  }
+  .close-video-button {
+    margin: 0 0 2px;
+    padding: 0;
+    background: none;
+    border: none;
+  }
+  .close-video-button span {
+    padding: 0 15px;
+    font-size: 48px;
+    color: var(--button-primary-text);
+  }
+  :global(dialog.video-dialog::backdrop) {
+    background: rgba(51, 51, 51, 0.8);
+  }
+  :global(dialog.video-dialog + .backdrop) {
+    background: rgba(51, 51, 51, 0.8);
+  }
+</style>
+<script>
+
+  import { importDialogPolyfill } from '../_utils/asyncModules'
+
+  export default {
+    oncreate() {
+      this.registration = this.register()
+    },
+    methods: {
+      async register() {
+        if (typeof HTMLDialogElement === 'undefined') {
+          let dialogPolyfill = await importDialogPolyfill()
+          dialogPolyfill.registerDialog(this.get('dialog'))
+        }
+      },
+      async showModal() {
+        await this.registration
+        this.get('dialog').showModal()
+      },
+      onCloseButtonClicked() {
+        this.get('dialog').close()
+        document.body.removeChild(this.get('dialog'))
+      }
+    }
+  }
+</script>
\ No newline at end of file
diff --git a/routes/_utils/asyncModules.js b/routes/_utils/asyncModules.js
index c4a77c5..07396fe 100644
--- a/routes/_utils/asyncModules.js
+++ b/routes/_utils/asyncModules.js
@@ -1,3 +1,5 @@
+import { loadCSS } from 'fg-loadcss';
+
 const importURLSearchParams = () => import(
   /* webpackChunkName: 'url-search-params' */ 'url-search-params'
   ).then(Params => {
@@ -25,10 +27,25 @@ const importIndexedDBGetAllShim = () => import(
   /* webpackChunkName: 'indexeddb-getall-shim' */ 'indexeddb-getall-shim'
   )
 
+const importDialogPolyfill = (() => {
+  let cached
+  return () => {
+    if (cached) {
+      return Promise.resolve(cached)
+    }
+    loadCSS('/dialog-polyfill.css') // TODO: handle error
+    return import(/* webpackChunkName: 'dialog-polyfill' */ 'dialog-polyfill').then(res => {
+      cached = res
+      return cached
+    })
+  }
+})()
+
 export {
   importURLSearchParams,
   importTimeline,
   importIntersectionObserver,
   importRequestIdleCallback,
-  importIndexedDBGetAllShim
+  importIndexedDBGetAllShim,
+  importDialogPolyfill
 }
\ No newline at end of file
diff --git a/routes/settings/_components/SettingsList.html b/routes/settings/_components/SettingsList.html
index 9f7600f..98c4cd9 100644
--- a/routes/settings/_components/SettingsList.html
+++ b/routes/settings/_components/SettingsList.html
@@ -7,12 +7,6 @@
     width: 100%;
     border: 1px solid var(--settings-list-item-border);
     margin: 20px auto;
+    max-width: 80%;
   }
-
-  @media (max-width: 767px) {
-    ul.settings-list {
-      max-width: 90%;
-    }
-  }
-
 </style>
\ No newline at end of file
diff --git a/scss/themes/_base.scss b/scss/themes/_base.scss
index 0a1b66d..5288ae9 100644
--- a/scss/themes/_base.scss
+++ b/scss/themes/_base.scss
@@ -54,6 +54,7 @@
 
   --mask-bg: $toast-bg;
   --mask-svg-fill: $secondary-text-color;
+  --mask-opaque-bg: rgba($toast-bg, 0.8);
 
   --deemphasized-text-color: #666;
 }
diff --git a/templates/2xx.html b/templates/2xx.html
index a62e46d..b0bf2b8 100644
--- a/templates/2xx.html
+++ b/templates/2xx.html
@@ -10,9 +10,9 @@
 
 	<style>
 /* auto-generated w/ build-sass.js */
-body{--button-primary-bg:#6081e6;--button-primary-text:#fff;--button-primary-border:#132c76;--button-primary-bg-active:#456ce2;--button-primary-bg-hover:#6988e7;--button-bg:#e6e6e6;--button-text:#333;--button-border:#a7a7a7;--button-bg-active:#bfbfbf;--button-bg-hover:#f2f2f2;--input-border:#dadada;--anchor-text:#4169e1;--main-bg:#fff;--body-bg:#e8edfb;--body-text-color:#333;--main-border:#dadada;--svg-fill:#4169e1;--form-bg:#f7f7f7;--form-border:#c1c1c1;--nav-bg:#4169e1;--nav-border:#214cce;--nav-a-border:#4169e1;--nav-a-selected-border:#fff;--nav-a-selected-bg:#6d8ce8;--nav-svg-fill:#fff;--nav-text-color:#fff;--nav-a-selected-border-hover:#fff;--nav-a-selected-bg-hover:#839deb;--nav-a-bg-hover:#577ae4;--nav-a-border-hover:#4169e1;--nav-svg-fill-hover:#fff;--nav-text-color-hover:#fff;--action-button-fill-color:#839deb;--action-button-fill-color-hover:#99afef;--action-button-fill-color-active:#577ae4;--settings-list-item-bg:#fff;--settings-list-item-text:#4169e1;--settings-list-item-text-hover:#4169e1;--settings-list-item-border:#dadada;--settings-list-item-bg-active:#e6e6e6;--settings-list-item-bg-hover:#fafafa;--toast-bg:#333;--toast-border:#fafafa;--toast-text:#fff;--mask-bg:#333;--mask-svg-fill:#fff;--deemphasized-text-color:#666}
+body{--button-primary-bg:#6081e6;--button-primary-text:#fff;--button-primary-border:#132c76;--button-primary-bg-active:#456ce2;--button-primary-bg-hover:#6988e7;--button-bg:#e6e6e6;--button-text:#333;--button-border:#a7a7a7;--button-bg-active:#bfbfbf;--button-bg-hover:#f2f2f2;--input-border:#dadada;--anchor-text:#4169e1;--main-bg:#fff;--body-bg:#e8edfb;--body-text-color:#333;--main-border:#dadada;--svg-fill:#4169e1;--form-bg:#f7f7f7;--form-border:#c1c1c1;--nav-bg:#4169e1;--nav-border:#214cce;--nav-a-border:#4169e1;--nav-a-selected-border:#fff;--nav-a-selected-bg:#6d8ce8;--nav-svg-fill:#fff;--nav-text-color:#fff;--nav-a-selected-border-hover:#fff;--nav-a-selected-bg-hover:#839deb;--nav-a-bg-hover:#577ae4;--nav-a-border-hover:#4169e1;--nav-svg-fill-hover:#fff;--nav-text-color-hover:#fff;--action-button-fill-color:#839deb;--action-button-fill-color-hover:#99afef;--action-button-fill-color-active:#577ae4;--settings-list-item-bg:#fff;--settings-list-item-text:#4169e1;--settings-list-item-text-hover:#4169e1;--settings-list-item-border:#dadada;--settings-list-item-bg-active:#e6e6e6;--settings-list-item-bg-hover:#fafafa;--toast-bg:#333;--toast-border:#fafafa;--toast-text:#fff;--mask-bg:#333;--mask-svg-fill:#fff;--mask-opaque-bg:rgba(51,51,51,0.8);--deemphasized-text-color:#666}
 body{margin:0;font-family:system-ui, -apple-system, BlinkMacSystemFont, Segoe UI, Roboto, Oxygen, Ubuntu, Cantarell, Fira Sans, Droid Sans, Helvetica Neue;font-size:14px;line-height:1.3;color:var(--body-text-color);background:var(--body-bg);position:fixed;left:0;right:0;bottom:0;top:0}.container{overflow-y:auto;overflow-x:hidden;-webkit-overflow-scrolling:touch;position:absolute;top:72px;left:0;right:0;bottom:0;will-change:transform}main{position:relative;width:602px;max-width:100vw;padding:15px 0;box-sizing:border-box;margin:15px auto 15px;background:var(--main-bg);border:1px solid var(--main-border);border-radius:1px}@media (max-width: 767px){main{margin:5px auto 15px}}h1,h2,h3,h4,h5,h6{margin:0 0 0.5em 0;font-weight:400;line-height:1.2}h1{font-size:2em}a{color:var(--anchor-text);text-decoration:none}a:visited{color:var(--anchor-text)}a:hover{text-decoration:underline}input{border:1px solid var(--input-border);padding:5px}button{font-size:1.2em;background:var(--button-bg);border-radius:2px;padding:10px 15px;border:1px solid var(--button-border);cursor:pointer;color:var(--button-text)}button:hover{background:var(--button-bg-hover)}button:active{background:var(--button-bg-active)}button[disabled]{opacity:0.35;pointer-events:none;cursor:not-allowed}button.primary{border:1px solid var(--button-primary-border);background:var(--button-primary-bg);color:var(--button-primary-text)}button.primary:hover{background:var(--button-primary-bg-hover)}button.primary:active{background:var(--button-primary-bg-active)}p,label,input{font-size:1.3em}ul,li,p{padding:0;margin:0}.hidden{opacity:0}
-body.offline,body.theme-hotpants.offline,body.theme-majesty.offline,body.theme-oaken.offline,body.theme-scarlet.offline,body.theme-seafoam.offline{--button-primary-bg:#ababab;--button-primary-text:#fff;--button-primary-border:#4d4d4d;--button-primary-bg-active:#9c9c9c;--button-primary-bg-hover:#b0b0b0;--button-bg:#e6e6e6;--button-text:#333;--button-border:#a7a7a7;--button-bg-active:#bfbfbf;--button-bg-hover:#f2f2f2;--input-border:#dadada;--anchor-text:#999;--main-bg:#fff;--body-bg:#fafafa;--body-text-color:#333;--main-border:#dadada;--svg-fill:#999;--form-bg:#f7f7f7;--form-border:#c1c1c1;--nav-bg:#999;--nav-border:gray;--nav-a-border:#999;--nav-a-selected-border:#fff;--nav-a-selected-bg:#b3b3b3;--nav-svg-fill:#fff;--nav-text-color:#fff;--nav-a-selected-border-hover:#fff;--nav-a-selected-bg-hover:#bfbfbf;--nav-a-bg-hover:#a6a6a6;--nav-a-border-hover:#999;--nav-svg-fill-hover:#fff;--nav-text-color-hover:#fff;--action-button-fill-color:#bfbfbf;--action-button-fill-color-hover:#ccc;--action-button-fill-color-active:#a6a6a6;--settings-list-item-bg:#fff;--settings-list-item-text:#999;--settings-list-item-text-hover:#999;--settings-list-item-border:#dadada;--settings-list-item-bg-active:#e6e6e6;--settings-list-item-bg-hover:#fafafa;--toast-bg:#333;--toast-border:#fafafa;--toast-text:#fff;--mask-bg:#333;--mask-svg-fill:#fff;--deemphasized-text-color:#666}
+body.offline,body.theme-hotpants.offline,body.theme-majesty.offline,body.theme-oaken.offline,body.theme-scarlet.offline,body.theme-seafoam.offline{--button-primary-bg:#ababab;--button-primary-text:#fff;--button-primary-border:#4d4d4d;--button-primary-bg-active:#9c9c9c;--button-primary-bg-hover:#b0b0b0;--button-bg:#e6e6e6;--button-text:#333;--button-border:#a7a7a7;--button-bg-active:#bfbfbf;--button-bg-hover:#f2f2f2;--input-border:#dadada;--anchor-text:#999;--main-bg:#fff;--body-bg:#fafafa;--body-text-color:#333;--main-border:#dadada;--svg-fill:#999;--form-bg:#f7f7f7;--form-border:#c1c1c1;--nav-bg:#999;--nav-border:gray;--nav-a-border:#999;--nav-a-selected-border:#fff;--nav-a-selected-bg:#b3b3b3;--nav-svg-fill:#fff;--nav-text-color:#fff;--nav-a-selected-border-hover:#fff;--nav-a-selected-bg-hover:#bfbfbf;--nav-a-bg-hover:#a6a6a6;--nav-a-border-hover:#999;--nav-svg-fill-hover:#fff;--nav-text-color-hover:#fff;--action-button-fill-color:#bfbfbf;--action-button-fill-color-hover:#ccc;--action-button-fill-color-active:#a6a6a6;--settings-list-item-bg:#fff;--settings-list-item-text:#999;--settings-list-item-text-hover:#999;--settings-list-item-border:#dadada;--settings-list-item-bg-active:#e6e6e6;--settings-list-item-bg-hover:#fafafa;--toast-bg:#333;--toast-border:#fafafa;--toast-text:#fff;--mask-bg:#333;--mask-svg-fill:#fff;--mask-opaque-bg:rgba(51,51,51,0.8);--deemphasized-text-color:#666}
 
 </style>
 
@@ -105,7 +105,13 @@ body.offline,body.theme-hotpants.offline,body.theme-majesty.offline,body.theme-o
 			<path d="M1536 1399q0 109-62.5 187t-150.5 78H469q-88 0-150.5-78T256 1399q0-85 8.5-160.5t31.5-152 58.5-131 94-89T583 832q131 128 313 128t313-128q76 0 134.5 34.5t94 89 58.5 131 31.5 152 8.5 160.5zm-256-887q0 159-112.5 271.5T896 896 624.5 783.5 512 512t112.5-271.5T896 128t271.5 112.5T1280 512z"></path>
 		</symbol>
 
-	</svg>
+    <symbol id="fa-play-circle" viewBox="0 0 1792 1792">
+      <title>Play</title>
+      <path d="M896 128q209 0 385.5 103T1561 510.5 1664 896t-103 385.5-279.5 279.5T896 1664t-385.5-103T231 1281.5 128 896t103-385.5T510.5 231 896 128zm384 823q32-18 32-55t-32-55L736 521q-31-19-64-1-32 19-32 56v640q0 37 32 56 16 8 32 8 17 0 32-9z"/>
+    </symbol>
+
+
+  </svg>
 	<!-- The application will be rendered inside this element,
 	     because `templates/main.js` references it -->
 	<div id='sapper'>%sapper.html%</div>
diff --git a/templates/main.js b/templates/main.js
index 3a1fb0e..5c6ede6 100644
--- a/templates/main.js
+++ b/templates/main.js
@@ -6,7 +6,8 @@ import {
   importURLSearchParams,
   importIntersectionObserver,
   importRequestIdleCallback,
-  importIndexedDBGetAllShim
+  importIndexedDBGetAllShim,
+  importDialogPolyfill
 } from '../routes/_utils/asyncModules'
 
 // polyfills
@@ -14,7 +15,8 @@ Promise.all([
   typeof URLSearchParams === 'undefined' && importURLSearchParams(),
   typeof IntersectionObserver === 'undefined' && importIntersectionObserver(),
   typeof requestIdleCallback === 'undefined' && importRequestIdleCallback(),
-  !IDBObjectStore.prototype.getAll && importIndexedDBGetAllShim()
+  !IDBObjectStore.prototype.getAll && importIndexedDBGetAllShim(),
+  typeof HTMLDialogElement === 'undefined' && importDialogPolyfill()
 ]).then(() => {
   // `routes` is an array of route objects injected by Sapper
   init(document.querySelector('#sapper'), __routes__)