Error if embedded video is not played or clicked?

We have a survey page with a product introduction, which comes in the form of about 8 little (10 or so second long) videos. They are all embedded, not streamed via hyperlink or other interface like YouTube or Vimeo. I know some questions have answered something like this, but it looks like they are all for non-embedded videos.

We want to force everyone to at least hit play on all the videos. If we can require that all videos are at least clicked on and played, then we would take that as a win.

Could that be done in Javascript as a custom error message to require clicks on the videos, and if so, what is the code? It doesn't appear to be able to be done without a Javascript.

Thanks in advance!