diff --git a/app/javascript/mastodon/features/audio/index.js b/app/javascript/mastodon/features/audio/index.js
index a4e00ba96c..5b81726945 100644
--- a/app/javascript/mastodon/features/audio/index.js
+++ b/app/javascript/mastodon/features/audio/index.js
@@ -115,6 +115,10 @@ class Audio extends React.PureComponent {
   }
 
   togglePlay = () => {
+    if (!this.audioContext) {
+      this._initAudioContext();
+    }
+
     if (this.state.paused) {
       this.setState({ paused: false }, () => this.audio.play());
     } else {
@@ -133,10 +137,6 @@ class Audio extends React.PureComponent {
   handlePlay = () => {
     this.setState({ paused: false });
 
-    if (this.canvas && !this.audioContext) {
-      this._initAudioContext();
-    }
-
     if (this.audioContext && this.audioContext.state === 'suspended') {
       this.audioContext.resume();
     }
diff --git a/app/views/statuses/_detailed_status.html.haml b/app/views/statuses/_detailed_status.html.haml
index 85b2ceea44..b3e9c44fc8 100644
--- a/app/views/statuses/_detailed_status.html.haml
+++ b/app/views/statuses/_detailed_status.html.haml
@@ -29,11 +29,11 @@
   - if !status.media_attachments.empty?
     - if status.media_attachments.first.video?
       - video = status.media_attachments.first
-      = react_component :video, src: video.file.url(:original), preview: video.thumbnail.present? ? video.thumbnail.url : video.file.url(:small), blurhash: video.blurhash, sensitive: status.sensitive?, width: 670, height: 380, detailed: true, inline: true, alt: video.description do
+      = react_component :video, src: full_asset_url(video.file.url(:original)), preview: full_asset_url(video.thumbnail.present? ? video.thumbnail.url : video.file.url(:small)), blurhash: video.blurhash, sensitive: status.sensitive?, width: 670, height: 380, detailed: true, inline: true, alt: video.description do
         = render partial: 'statuses/attachment_list', locals: { attachments: status.media_attachments }
     - elsif status.media_attachments.first.audio?
       - audio = status.media_attachments.first
-      = react_component :audio, src: audio.file.url(:original), poster: audio.thumbnail.present? ? audio.thumbnail.url : status.account.avatar_static_url, backgroundColor: audio.file.meta.dig('colors', 'background'), foregroundColor: audio.file.meta.dig('colors', 'foreground'), accentColor: audio.file.meta.dig('colors', 'accent'), width: 670, height: 380, alt: audio.description, duration: audio.file.meta.dig('original', 'duration') do
+      = react_component :audio, src: full_asset_url(audio.file.url(:original)), poster: full_asset_url(audio.thumbnail.present? ? audio.thumbnail.url : status.account.avatar_static_url), backgroundColor: audio.file.meta.dig('colors', 'background'), foregroundColor: audio.file.meta.dig('colors', 'foreground'), accentColor: audio.file.meta.dig('colors', 'accent'), width: 670, height: 380, alt: audio.description, duration: audio.file.meta.dig('original', 'duration') do
         = render partial: 'statuses/attachment_list', locals: { attachments: status.media_attachments }
     - else
       = react_component :media_gallery, height: 380, sensitive: status.sensitive?, standalone: true, autoplay: autoplay, media: status.media_attachments.map { |a| ActiveModelSerializers::SerializableResource.new(a, serializer: REST::MediaAttachmentSerializer).as_json } do
diff --git a/app/views/statuses/_simple_status.html.haml b/app/views/statuses/_simple_status.html.haml
index aa1e83151a..d6ab7a837f 100644
--- a/app/views/statuses/_simple_status.html.haml
+++ b/app/views/statuses/_simple_status.html.haml
@@ -35,11 +35,11 @@
   - if !status.media_attachments.empty?
     - if status.media_attachments.first.video?
       - video = status.media_attachments.first
-      = react_component :video, src: video.file.url(:original), preview: video.thumbnail.present? ? video.thumbnail.url : video.file.url(:small), blurhash: video.blurhash, sensitive: status.sensitive?, width: 610, height: 343, inline: true, alt: video.description do
+      = react_component :video, src: full_asset_url(video.file.url(:original)), preview: full_asset_url(video.thumbnail.present? ? video.thumbnail.url : video.file.url(:small)), blurhash: video.blurhash, sensitive: status.sensitive?, width: 610, height: 343, inline: true, alt: video.description do
         = render partial: 'statuses/attachment_list', locals: { attachments: status.media_attachments }
     - elsif status.media_attachments.first.audio?
       - audio = status.media_attachments.first
-      = react_component :audio, src: audio.file.url(:original), poster: audio.thumbnail.present? ? audio.thumbnail.url : status.account.avatar_static_url, backgroundColor: audio.file.meta.dig('colors', 'background'), foregroundColor: audio.file.meta.dig('colors', 'foreground'), accentColor: audio.file.meta.dig('colors', 'accent'), width: 610, height: 343, alt: audio.description, duration: audio.file.meta.dig('original', 'duration') do
+      = react_component :audio, src: full_asset_url(audio.file.url(:original)), poster: full_asset_url(audio.thumbnail.present? ? audio.thumbnail.url : status.account.avatar_static_url), backgroundColor: audio.file.meta.dig('colors', 'background'), foregroundColor: audio.file.meta.dig('colors', 'foreground'), accentColor: audio.file.meta.dig('colors', 'accent'), width: 610, height: 343, alt: audio.description, duration: audio.file.meta.dig('original', 'duration') do
         = render partial: 'statuses/attachment_list', locals: { attachments: status.media_attachments }
     - else
       = react_component :media_gallery, height: 343, sensitive: status.sensitive?, autoplay: autoplay, media: status.media_attachments.map { |a| ActiveModelSerializers::SerializableResource.new(a, serializer: REST::MediaAttachmentSerializer).as_json } do
diff --git a/lib/paperclip/color_extractor.rb b/lib/paperclip/color_extractor.rb
index 44fe5ff1da..c8bb771a0b 100644
--- a/lib/paperclip/color_extractor.rb
+++ b/lib/paperclip/color_extractor.rb
@@ -5,6 +5,7 @@ require 'mime/types/columnar'
 module Paperclip
   class ColorExtractor < Paperclip::Processor
     MIN_CONTRAST        = 3.0
+    ACCENT_MIN_CONTRAST = 2.0
     FREQUENCY_THRESHOLD = 0.01
 
     def make
@@ -26,8 +27,9 @@ module Paperclip
 
       foreground_palette.each do |color|
         distance = ColorDiff.between(background_color, color)
+        contrast = w3c_contrast(background_color, color)
 
-        if distance > max_distance
+        if distance > max_distance && contrast >= ACCENT_MIN_CONTRAST
           max_distance = distance
           max_distance_color = color
         end
@@ -77,8 +79,8 @@ module Paperclip
     private
 
     def w3c_contrast(color1, color2)
-      luminance1 = (0.2126 * color1.r + 0.7152 * color1.g + 0.0722 * color1.b) + 0.05
-      luminance2 = (0.2126 * color2.r + 0.7152 * color2.g + 0.0722 * color2.b) + 0.05
+      luminance1 = color1.to_xyz.y * 0.01 + 0.05
+      luminance2 = color2.to_xyz.y * 0.01 + 0.05
 
       if luminance1 > luminance2
         luminance1 / luminance2