1080p

YouTube has never let Apple devices or browsers watch above 1440p because they use a special, proprietary codec for their 4K video. At least we could watch QHD/2K (1440p), but YouTube has now even further starved Apple by rescinding that to 1080p again. Seriously, Google? Petty. Fix it.

mattxherbst about YouTube - Watch, Upload and Share Videos, v13.12