Merge commit '6c4c72497a5722870e4432ef41dd4c9ec36a8928' into glitch-soc/merge-upstream

Conflicts:
- `.github/workflows/build-releases.yml`:
  Upstream changed comments close to a line we modified to account for
  different container image repositories.
  Updated the comments as upstream did.

app/models/media_attachment.rb

@@ -100,6 +100,8 @@ class MediaAttachment < ApplicationRecord
       output: {
         'loglevel' => 'fatal',
         'preset' => 'veryfast',
+        'movflags' => 'faststart', # Move metadata to start of file so playback can begin before download finishes
+        'pix_fmt' => 'yuv420p', # Ensure color space for cross-browser compatibility
         'c:v' => 'h264',
         'c:a' => 'aac',
         'b:a' => '192k',