diff --git a/app/javascript/mastodon/components/media_gallery.js b/app/javascript/mastodon/components/media_gallery.js
index 9e1bb77c2c1..3568a844077 100644
--- a/app/javascript/mastodon/components/media_gallery.js
+++ b/app/javascript/mastodon/components/media_gallery.js
@@ -283,8 +283,9 @@ export default class MediaGallery extends React.PureComponent {
       if (width) {
         style.height = width / this.props.media.getIn([0, 'meta', 'small', 'aspect']);
       }
+    } else if (width) {
+      style.height = width / (16/9);
     } else {
-      // crop the image
       style.height = height;
     }
 
@@ -309,7 +310,7 @@ export default class MediaGallery extends React.PureComponent {
       if (this.isStandaloneEligible()) {
         children = <Item standalone onClick={this.handleClick} attachment={media.get(0)} />;
       } else {
-        children = media.take(4).map((attachment, i) => <Item key={attachment.get('id')} onClick={this.handleClick} attachment={attachment} index={i} size={size} containerWidth={width} containerHeight={height} />);
+        children = media.take(4).map((attachment, i) => <Item key={attachment.get('id')} onClick={this.handleClick} attachment={attachment} index={i} size={size} containerWidth={width} containerHeight={style.height} />);
       }
     }
 
diff --git a/app/javascript/mastodon/components/status.js b/app/javascript/mastodon/components/status.js
index c030510a09b..c52cd5f0908 100644
--- a/app/javascript/mastodon/components/status.js
+++ b/app/javascript/mastodon/components/status.js
@@ -184,6 +184,7 @@ export default class Status extends ImmutablePureComponent {
                 src={video.get('url')}
                 width={239}
                 height={110}
+                inline
                 sensitive={status.get('sensitive')}
                 onOpenVideo={this.handleOpenVideo}
               />
diff --git a/app/javascript/mastodon/features/status/components/detailed_status.js b/app/javascript/mastodon/features/status/components/detailed_status.js
index abdb9a3f685..d4f21fc32b0 100644
--- a/app/javascript/mastodon/features/status/components/detailed_status.js
+++ b/app/javascript/mastodon/features/status/components/detailed_status.js
@@ -57,6 +57,7 @@ export default class DetailedStatus extends ImmutablePureComponent {
             src={video.get('url')}
             width={300}
             height={150}
+            inline
             onOpenVideo={this.handleOpenVideo}
             sensitive={status.get('sensitive')}
           />
diff --git a/app/javascript/mastodon/features/video/index.js b/app/javascript/mastodon/features/video/index.js
index c81a5cb5fc3..98ebcb6f91d 100644
--- a/app/javascript/mastodon/features/video/index.js
+++ b/app/javascript/mastodon/features/video/index.js
@@ -97,6 +97,7 @@ export default class Video extends React.PureComponent {
     onOpenVideo: PropTypes.func,
     onCloseVideo: PropTypes.func,
     detailed: PropTypes.bool,
+    inline: PropTypes.bool,
     intl: PropTypes.object.isRequired,
   };
 
@@ -105,6 +106,7 @@ export default class Video extends React.PureComponent {
     duration: 0,
     paused: true,
     dragging: false,
+    containerWidth: false,
     fullscreen: false,
     hovered: false,
     muted: false,
@@ -113,6 +115,12 @@ export default class Video extends React.PureComponent {
 
   setPlayerRef = c => {
     this.player = c;
+
+    if (c) {
+      this.setState({
+        containerWidth: c.offsetWidth,
+      });
+    }
   }
 
   setVideoRef = c => {
@@ -246,12 +254,23 @@ export default class Video extends React.PureComponent {
   }
 
   render () {
-    const { preview, src, width, height, startTime, onOpenVideo, onCloseVideo, intl, alt, detailed } = this.props;
-    const { currentTime, duration, buffer, dragging, paused, fullscreen, hovered, muted, revealed } = this.state;
+    const { preview, src, inline, startTime, onOpenVideo, onCloseVideo, intl, alt, detailed } = this.props;
+    const { containerWidth, currentTime, duration, buffer, dragging, paused, fullscreen, hovered, muted, revealed } = this.state;
     const progress = (currentTime / duration) * 100;
+    const playerStyle = {};
+
+    let { width, height } = this.props;
+
+    if (inline && containerWidth) {
+      width  = containerWidth;
+      height = containerWidth / (16/9);
+
+      playerStyle.width  = width;
+      playerStyle.height = height;
+    }
 
     return (
-      <div className={classNames('video-player', { inactive: !revealed, detailed, inline: width && height && !fullscreen, fullscreen })} style={{ width, height }} ref={this.setPlayerRef} onMouseEnter={this.handleMouseEnter} onMouseLeave={this.handleMouseLeave}>
+      <div className={classNames('video-player', { inactive: !revealed, detailed, inline: inline && !fullscreen, fullscreen })} style={playerStyle} ref={this.setPlayerRef} onMouseEnter={this.handleMouseEnter} onMouseLeave={this.handleMouseLeave}>
         <video
           ref={this.setVideoRef}
           src={src}
diff --git a/app/javascript/styles/mastodon/components.scss b/app/javascript/styles/mastodon/components.scss
index 9f11ec4b7c8..90c07f5693f 100644
--- a/app/javascript/styles/mastodon/components.scss
+++ b/app/javascript/styles/mastodon/components.scss
@@ -4365,7 +4365,7 @@ a.status-card {
 
   &.inline {
     video {
-      object-fit: cover;
+      object-fit: contain;
       position: relative;
       top: 50%;
       transform: translateY(-50%);
diff --git a/app/views/stream_entries/_detailed_status.html.haml b/app/views/stream_entries/_detailed_status.html.haml
index 470bff218c8..e1122d5a2ea 100644
--- a/app/views/stream_entries/_detailed_status.html.haml
+++ b/app/views/stream_entries/_detailed_status.html.haml
@@ -22,7 +22,7 @@
   - if !status.media_attachments.empty?
     - if status.media_attachments.first.video?
       - video = status.media_attachments.first
-      %div{ data: { component: 'Video', props: Oj.dump(src: video.file.url(:original), preview: video.file.url(:small), sensitive: status.sensitive? && !current_account&.user&.setting_display_sensitive_media, width: 670, height: 380, detailed: true) }}
+      %div{ data: { component: 'Video', props: Oj.dump(src: video.file.url(:original), preview: video.file.url(:small), sensitive: status.sensitive? && !current_account&.user&.setting_display_sensitive_media, width: 670, height: 380, detailed: true, inline: true) }}
     - else
       %div{ data: { component: 'MediaGallery', props: Oj.dump(height: 380, sensitive: status.sensitive? && !current_account&.user&.setting_display_sensitive_media, standalone: true, 'autoPlayGif': current_account&.user&.setting_auto_play_gif, 'reduceMotion': current_account&.user&.setting_reduce_motion, media: status.media_attachments.map { |a| ActiveModelSerializers::SerializableResource.new(a, serializer: REST::MediaAttachmentSerializer).as_json }) }}
   - elsif status.preview_cards.first
diff --git a/app/views/stream_entries/_simple_status.html.haml b/app/views/stream_entries/_simple_status.html.haml
index ce723f1ccb2..984691097b4 100644
--- a/app/views/stream_entries/_simple_status.html.haml
+++ b/app/views/stream_entries/_simple_status.html.haml
@@ -23,6 +23,6 @@
   - unless status.media_attachments.empty?
     - if status.media_attachments.first.video?
       - video = status.media_attachments.first
-      %div{ data: { component: 'Video', props: Oj.dump(src: video.file.url(:original), preview: video.file.url(:small), sensitive: status.sensitive? && !current_account&.user&.setting_display_sensitive_media, width: 610, height: 343) }}
+      %div{ data: { component: 'Video', props: Oj.dump(src: video.file.url(:original), preview: video.file.url(:small), sensitive: status.sensitive? && !current_account&.user&.setting_display_sensitive_media, width: 610, height: 343, inline: true) }}
     - else
       %div{ data: { component: 'MediaGallery', props: Oj.dump(height: 343, sensitive: status.sensitive? && !current_account&.user&.setting_display_sensitive_media, 'autoPlayGif': current_account&.user&.setting_auto_play_gif, media: status.media_attachments.map { |a| ActiveModelSerializers::SerializableResource.new(a, serializer: REST::MediaAttachmentSerializer).as_json }) }}