Not sure if it’s been mentioned here yet but I have noticed on the last few builds that the videos play smoothly right up to within the last few minutes of each episode/movie
Doesn’t seem to matter what the quality of the source is, everything from dvd to 4k blu rays has the same behavior. Once the next episode or movie has started, it’s smooth again. Doesn’t seem to be heat related either because even from a cold start, if I skip to the final few minutes itll be dropping frames all over the place. Tested on 2 separate Apple TVs with the same results.
On a positive note deinterlacing is a welcome feature and is working very well for me so far 
