If a user is browsing videos on YouTube.com from a web browser on a higher-end device (e.g., VR headsets), the user has to manually override the playback quality of a video through the playback-controls bar at the bottom of the video: Settings > Quality.
- Load a YouTube video. Example: https://www.youtube.com/watch?v=ELU-43DMNT4
- Then paste some of this code in the DevTools' Console.
- You'll notice the quality changes to the highest available for the video.