Video is the heaviest thing most of us ever attach: screen recordings, camera clips, whole talks. It comes from wherever your camera, screen recorder or download made it.
MOV is Apple's homebody: gorgeous on a Mac, awkward everywhere else. The QuickTime container; often H.264 or HEVC, sometimes heavyweight editing codecs like ProRes. That makes it the right destination when what you need is shooting and editing on Apple hardware, where it's the native tongue.