CachyOS can't stream to YouTube

[MatrixGoW]

I'ts a default installation using Plasma desktop with a 6700 XT gpu.
Tried with the package manager version and through flatpak.
Flatpak only has encoder x264, can't select HEVC.
Seems a communication issue to YouTube server.
The screenshot error says: "An error occured trying to connect to the server"
Log:
[ffmpeg muxer: 'adv_stream'] os_process_pipe_write for packet data failed
[ffmpeg muxer: 'adv_stream'] ffmpeg-mux: av_interleaved_write_frame failed: -5: Input/output error

On Windows it works fine.

 

[MatrixGoW]

I just found out that when I clicked the copy key button on YouTube it was with the whole url.
Selecting only the 20 digit alphanumeric key, solved it.