Cool. But why this complex?
to use video controls on damus, upload an image first, and then post whatever video(s) you’d like 💜
after posting, click on the image, to make it full screen, then swipe next to the video, and tap on the screen and click play
nostr:npub1zafcms4xya5ap9zr7xxr0jlrtrattwlesytn2s42030lzu0dwlzqpd26k5 
https://v.nostr.build/GYGV.mp4
Discussion
"If I throw a dog a bone, I don't want to know how it tastes"