As for video recording, Samsung S21 Ultra 5G can record up to
Resolution of up to :
8K video recording at 24 fps (7680×4320)
4K UHD video recording at 60 fps (3840×2160)
1080p FHD video recording at 60 fps (1920×1080)
720p HD video recording at 30 fps (1280×720)
Super Steady 1080p video support at 60 fps
Super Slow-mo 720p video support at 960 fps
Slow motion 1080p video support at 240 fps
Hyperlapse 4K video support at 30 fps
You can also take 33MP still photos while playing 8K video. Zoom-in MIC (Audio zoom) feature is available and is good for focusing the audio if the person is some distance away from you.
As 8K video recording is only in 24 fps, do expect some shakiness if you don’t use it with a gimbal. The only mode that supports Super Steady is HD recording at 1080p 60 fps.