Here are two freeware and 2 free online tools to convert MOV to MP4. MOV video files are not popular & well supported across the board, which means, it would make sense to convert MOV to MP4.

Movavi Video Converter for Mac provides a fast, high-quality, and user-friendly solution for converting MOV files to over 180 different formats. Key features of the software include: ...

There is a simple way and free way to convert video to MP3. You can do this with MP4 videos, MOV, and other video formats.