The only problem we see: they don't work. Well, maybe sometimes. In today's test, the slider at the start of the video appears to be bolted in place, while the end slider moves. Sometimes. But it's like trying to draw with a brick: not very precise.
Much prefer to be able to download the video files (speaker, gallery, shared screen), clean them up in a video editor, then push the clean version back to Zoom.
We can do it - but not if we want to control registration to the on demand video.