> I think that thumbnail and link to YouTube will be fine. Embedding will track
> users, but maybe there is a way to fetch the thumbnails on the server (maybe
> when video is added), the video don't need to run on page directly. Haskell
> did the same, they are just thumbnails + titles that link to YouTube.

Sounds good. We can manually fetch the thumbnails (by taking a
screenshot of a still frame of the video, or perhaps using an API or
script) and upload the static JPEG file to scheme.org. Copyright-wise, a
still frame probably is fair use.