How to upload videos from Mac to iCloud?

So I have a year long period (mid 2016-17) during which auto uploading to iCloud must have been turned off or something and I have a bunch of photos and videos from that period that I want to upload to iCloud. The photos, no problem. I upload them from my Mac Mini (2019, Catalina, most recent update) to iCloud, but videos are not possible as you get a "only JPG can be uploaded" type error message.

I have scoured the interwebs to see if there is a solution, but I just haven't found anything. Is there any possible solution? I am so aggravated by yet another simple feature that Apple doesn't give us that leads to so much headache. If anyone knows a solution I would appreciate it!