Videos are croped in full screen.

[Mr-Bajs]

Using a Google Pixel Tablet, a fairly common device but with to my understanding have an rather unusual aspect ratio of 16:10.
Though by using BraveNewPipe to watch a in this case a youtube video in full screen BraveNewPipe crops so a part of the left and the right of the video is cropped or out of the screen.

This issue doesn't occur when using the NewPipe or NewPipe x SponsorBlock x Return YouTube Dislike, these apps add a black border instead on the top and bottom and shows the whole video.