Fix ios playback recording of mp4 files with missing MOOV
Missing MOOV data in mp4 was causing VLC to trip up on ios/macos/safari. This patch fixes playback of recorded video. See https://openmp4file.com/format.html#:~:text=MP4%20structures%20are%20typically%20referred,4%20bytes%20specify%20its%20type
Credits to Parxson from discord for all the help!