Enable video play, but disable pause and all subsequent video controls.

Hello!
Up front: I've found a similar question on the help pages, but it's inactive recently and I can't get the offered solutions to work.
I have youtube videos I'd like to embed in my survey. Because there are many users that have disabled autoplay for youtube on their browsers, I want participants to be able to click play on the video. However, after they click play, I don't want participants to pause or use any other controls.
Please note: in all of my attempts on this, I have no clue if the javascript works and I'm clueless on html as well. The only thing that seems to work for me is the basic iframe embedding code below (but this won't work on those browsers where autoplay is disabled, and then they can't click play).

It would also be great if I could have the "next" button appear when the video is complete, but- again- I can't get any of the code chunks to work when I try to integrate.