MOV is a video format developed by Apple but compatible with most software and players. MOV uses the MPEG-4 codec for compression making the conversion between MOV to MP4 very simple, as seen below:
$ ffmpeg -i input.mov output.mp4
Tip: MOV files are usually larger in size but a higher quality video in comparison to MP4.But the MOV format does run the risk of compatibility issues due to it being maintained for Apple products.
Tip: Instagram and Twitter support MOV video uploads.