Solving the “read more” mystery was easy. If a blog entry is short, you see it all. If it is long, you see “read more”. If it is just right, so the text is short but the video takes up space, then you see the text (in the digest) but don’t see the video, and don’t see “read more”. The solution is – be verbose 🙂
However, I would like to add another video, this time hosted from somewhere other than YouTube.
https://drive.google.com/open?id=1rN9dgv3c41l8TEZRZQ07-95k_qxNJ30W
Most of the available “embed” options are streaming resources (YT, Facebook, Vimeo, etc.), However, embed-embed does offer a generic “insert URL here” box, which is likely to work with Google Drive, etc. …
… Except that there is a world of difference between embedding a streamable video (e.g. via YouTube) versus providing the URL to a publicly shared downloadable file which just so happens to be a video (e.g. the google drive link, above). Even if I were to make the link look pretty by hiding it under a thumbnail or a button, it would still correspond to a file that would need to be downloaded before being played. And that is entirely not what people expect when they see a “video link”. Play should play, not precipitate a download 😦