I’ve had no luck with 4K video from DJI, but other lower butrate 4K video I’ve had success with.
I have the latest AppleTV 4K and it struggles via WiFi, won’t do 4K but will barely handle 1080p. Wired helps a lot.
I also have an ancient WD Live TV box that plays the 1080p flawlessly and plays the 4K with 15 seconds of buffering every 15 seconds.
Basically, to date, I can’t find a way to play the 4k video file off the phantom 4
I’d like to see what happens with 4K video using the h.265 codec because the AppleTV has hardware decoding support for that codec.