[It's not a particularly riveting scene - Sentinel is sitting cross-legged on his berth and reading a book that's balanced on his lap. The device is not positioned in a way that makes it clear to see what the contents are - however it's obvious that whatever it is, Sentinel is not particularly enjoying the read; he's frowning more intensely than usual.]
[Not 10 seconds into the video, he flips one of the pages and stares at it for a few seconds before snapping the book closed and throwing it with quite a lot of force at the wall - with the loud noise it makes it pretty clear something was broken.]
[He vents heavily and rubs his face with a servo before noticing the device is recording. There's then a lovely few seconds of him letting off a stream of swear words while quickly shutting it off.]