I have not tried it, but let me check on that. I guess YouTube gives only 720p on its app ?
Alternatively, what I do is, I download YouTube videos using 4kdownloader for offline viewing, by adding it to plex media server and then streaming via Plex app. Music videos of Tamil movies I watch often, so I dont have to stream again and again but just plex it from local hard drive. This way you can download it with 4K quality also, if available
Can you please check 1080p? I don't have 4K display and I also don't want to download upfront.