It doesn't look like it is. I have tried and it looks like it supports 1080p.
I'm not sure the issue is with the youtube app, or the GT1 firmware.
I know the Beelink does not auto-detect the native 4K resolution of my TV and I suspect this is also causeing Kodi (and possibly youtube) to not detect 4K.
I have the same problem and I also have a samsung 4k TV. My TV and GT1 box are set to 4k resolution. Both the TV and the box recognize each other at 4k but the youtube app only shows 1080p as maximum resolution possible. I am using the youtube app. Not the web browser.
I bought this box mainly for youtube 4k content and I cannot use it. Please, fix this.
Also, the app that is supposed to work as AIRPLAY receiver does not work at all. I cannot mirror my apple devices.
khalid replied at 2016-10-15 10:56
GT1 cannot play 2k/4k on youtube from web
youtube apps only play 1080p only
airplay need to wait f ...
Hello khalid.
Thanks for your reply.
I do not understand completely what you mean with your reply.
We know that GT1 does not play 4k from the web or youtube app. That is why we are asking them to fix it.
Airplay support has never worked.
How do you know they will be fixed with the next firmware?