Ports #6092 from master: the video-app opacity opt-out only matched
Chrome/Chromium on the default profile, so Brave, Edge, and non-default
profiles kept the translucent default-opacity styling.
Co-Authored-By: Zeus-Deus <github.commits@widow.cc>
Co-Authored-By: Claude Fable 5 <noreply@anthropic.com>