I had some settings seriously wrong.

Right?

Ricoh theta SC 360 video Dec 7 2019 foorball playoff game - YouTube

Yeah, something’s not right with the stitching. I’m afraid I don’t know much about the video-capable theta, but it should be either stitching internally, or, you should post-stitch.

The goal is an equirectangular projection that you upload to Youtube.

But that’s a pretty cool video - fun with math and images!