MOV file doesn't play in quicktime; it only plays in Omni player
I tried changing file name from mov to mp4; it didn't help. How can I convert this file into mp4?
iPhone 15 Pro Max, iOS 18
since you only want to convert one file, you can try the free online converter. https://www.freeconvert.com/mov-to-mp4
if you need to convert many files, you could try the free app HandBrake.