Broadcast to youtube with ultra wide monitor (21:9)

[Snorrky]

Hi! I have some problem with my broadcast. When I set the video settings as in the picture for a 21: 9 monitor, I get this result on YouTube. On Twitch, the video goes fine, streaming through other capture programs also gives a normal picture. Only OBS - youtube gives that pic.

 

[Tomasz Góral]

Of course, have you read what resolutions and image formats does YT support?

 

[Snorrky]

Read of course. 23.04.2020 broadcast was OK, via OBS. Now if you try using Geforce NOW, everything is fine.
If you view a 2560*1080 video on regular monitors, YT adds stripes on the top and bottom, rather than the current stripes on all sides. Apparently it's the OBS settings, the question is what?