I don't think it is a codec issue nor is it a headset issue. A new video with a thumbnail that says "8k" will only have a 1080p option when played via DEOVR on Steam with PC -- tested headsets: Pimax direct cable. Quest 3 via Virtual Desktop, Galaxy XR via VD.
Example 1: video from June 9 2026 "Cheerleader Kait & Talulah Get You Alone" video 89662 which has thumbnail stating 8k, and download 8k.
--That video when played on DEOVR on SteamVR PC will only play 1080p
--That video when played natively on DEOVR on Quest 3 app and DEOVR for Galaxy XR app will play at 4096p.
A few more clues: that video when played back from SLR website on Firefox 'click play button' I get resolution option only showing 1080p. HOWEVER when clicking playback on SLR website on web browsers Chrome, DuckDuckGo, or MS Edge I get options all the way up to 4096p.
Example 2: When playing a movie from 1 year ago e.g.: "Sex in the car with Adriana" video 49915 which has thumbnail stating 8k, and download 8k.
--it plays in DEOVR on PC with headsets Quest3/GalaxyXR, Pimax all in resolutions up to 4096p.
--it plays on all web browsers (including Firefox) it offers playback up to 4096p resolution as well.
Example 3: If I go back to videos from four months ago e.g.: "Bree Sky Loves Sloppy Head" video 80441, which has thumbnail stating 8k, and download 8k.
--That video when played on DEOVR on SteamVR PC will only play at 1080p, 1440p, and 1940p
--That video when played natively on DEOVR on Quest 3 app and DEOVR for Galaxy XR app will play at 4096p.
--Firefox playback is limited to resolutions up to 1940p as well, although other browsers offer playback at higher resolutions up to 4096p
Notes: Win11, RTX 5090, Active premium SLR membership. Signed into app and websites for testing.