Mine can’t play blu rays properly. I pop in the disc and the video will stutter at time and the screen goes completely black for a few seconds at a time. Very weird. I haven’t tried any other video apps on it yet.
I still have the old Xbox One plugged so I used that to watch a movie last night. Kind of frustrating.
UPDATE: Also applies to 4k games. My son was playing Fortnite and the same black screen stuttering was happening.