Try "actual" content videos. You can press ctrl+alt+shift+D to open a debug overlay that shows the playback resolution.
The actual DRM limitations also vary by content (and region) - with some titles I get 720p on Linux while some other titles are limited to SD, while I get 1080p on Windows Edge on those same titles.
The actual DRM limitations also vary by content (and region) - with some titles I get 720p on Linux while some other titles are limited to SD, while I get 1080p on Windows Edge on those same titles.