Same issue with iPad although after a restart I can usually get about 10 additional before another reset. Do you have an Android device you can use? They are playing vids with no problems.
Everything working fine for me. Have you tried resetting your AD ID?
It’s erratic for me too on my iPad , I have an older iPad on which I can reset ID and that is better. Also I find if I try and use two devices at the same time for vids , it seems to knock either one out .