Note: I've never had a problem with Quicktime playing both .MOV or .MP4 files, I, however, do have a problem with files now being produced by my Mavic
Mini 3 Pro which, after a firmware update, cannot be played by Quicktime (no matter which format) or previewed on my Mac by simply highlighting the file and pressing the Space bar. Also, the files all have a horrible purple cast on them, Movist Pro will play the files - badly. FXCP reads them just fine, but it is a pain in the proverbial that I cannot preview my files and decide which ones to include in my FXCP editing, I have to include all first and clear out the chaff afterwards - not ideal. I am in conversation with DJI about this.