I have shot video in both MOV and MP4 and after editing and saving, uploaded both mediums to Youtube successfully. I have no idea what Youtube's medium is after it saves the upload but it usually looks very good online, and they offer the user online tools for modification..mp4 is used for Android, .mov for iOS. Either can be played on a PC, assuming the correct software is installed. Not sure what Youtube, etc. want format-wise as I don't upload videos to the Internet...I'm sure someone with experience with that will chime in.