When attempting to embed a youtube video using embed content on page, the item is added with a deleted heading and displays as HTTP 404(see screenshot).
Example youtube video:
For people running 10.7, a quick fix can be found at
If you just do the fix in SimplePageBean there, it will fix most of the symptoms in 10.7. (The show-page.js patch is more relevant to 11 and 12.) More changes will be in 10.8. Feel free to take all of them, but that one change to SimplePageBean is easy to do and will let you see Youtube again.