How I convert short videos:
- Loop the video. In Apple photos it’s one of the Live options, along with Bounce (and if you can Bounce, play with that — you might make a bird wag its head, for example).
- Export as GIF. Medium loves GIFs and supports animated GIFs.
- Pull into Medium as you would any picture. It should handle it from there.

You’re like Deb, you’re more techy than you give yourself credit.
DEB: That’s not being a tech, that’s just common sense.
Yes, dear. 😁