so i just tried on my own lay theme website and an mp4 video works on my site.
then i used your video file and it doesnt work on the website for ipad.
try this video:
https://download.blender.org/peach/bigbuckbunny_movies/
the .mp4 one.
its a sample video.
this one should work.
now it seems maybe there's something wrong with the mp4 file.
i tried converting it using the handbrake app for mac. but that didn't fix the issue.
maybe try and somehow change the video file, like export it in a different way.
if nothing works you could add it as a vimeo or youtube video :/
