Stuttering Playback of .mkv Files on Samsung TV with Jellyfin App

[Banaszi]

Here are my settings for my global user - https://i.imgur.com/uzgJC2M.png
I have no idea why my dashboard is in Polish, but here's translation:
Allow media playback
Allow playback of audio that requires transcoding
Allow playback of video that requires transcoding
Allow playback of video that requires conversion without re-encoding
Force transcoding of external media sources like live TV

Thanks for a post