7 Best Solutions to Save iMovie as MP4 on Mac OS X/11/12
MXF Converter - mxf video conversion solution, format transform from MXF to avi, mp4, mov, mkv, etc and transfer MXF files to Mac iMovie FCP, ProRes, Windows Movie Maker editing program.
Import MP4 Files to iMovie
Convert MP4 to AVCHD with Filestar - Fast and Easy
Video Converter for Mac and Windows – Avdshare
How to Convert HDV Files to MP4 Easily on Windows/Mac