quicktime won't open video from iPhone
I'm using an iPhone 6, and a macbook (2013). I'm not a tech guy, and don't know all the software specifics, but the OS on both machines is up to date. Yesterday I shot a short video on my iPhone and emailed it to myself. I chose the "airdrop" option, because the file was too big for regular email. I went to email (it took ~12 hours to arrive) and the download link was there. I clicked to download the file, then went to Finder to open it. When I clicked on the file, I got an error message that says "QuickTime Player can't open "IMG_2649.MOV"".
Any idea what's going on here? Can anyone explain in ordinary language how to fix this?
It seems kind of absurd that I'm using two Apple devices and they can't communicate with each other. What's going on here? In all cases I'm using the default settings that Apple encourages (video format, video player, airdrop...). Why doesn't it work? And why, when I search Apple for information, do I only get vague information about "downloading another app"? Shouldn't this work with native software? Seems like a pretty basic use of the technology.
iPhone 6, iOS 10.0.2