This is an update. The WordPress guy came back to me with answers. It is a dual problem: a HTML validity issue and an invalid tag issue in TinyMCE.
- One way to solve the problem would be to use the “-Smart YouTube”- plugin. I won’-t.
- If I embed the YouTube video in the “-HTML”- area, and don’-t click on “-Visual”- before publishing, all is fine —-the YouTube video will end up in the feed reader. I’-ll do that, now.