iMovie and QuickTime files
I did NOT want iMovie files to change into QuickTime. How does that happen?
iPad Pro, iPadOS 14
Files are associated with an application based on their suffix.
For .mov/.m4v/.mp4 that association is with QuickTime by default.
On Macs, you can change it to another application, if you wish – but for that one Mac only.
On iPads, I don’t think you can change it.