This term one of my main goals is to create a video loop culture so students can see a performance to model their own on using ipads and tvs that I have available. I found this great app called :
CWG's Video Loop Presenter
So far it ticks all the right boxes. To prepare for use, video a short clip of what you are after then open it into the video loop.
I have tried a few others but they seem to jam in the app and blank out.