Then I'd say don't type in any titles....I just deleted the titles from your last string of posted videos and the YT boxes all appeared.The hyperlinks are still there when I click on the quote button....Nobody is deleting your stuff.
Not deleted, but hidden for some reason.
Have you tried posting one without listing the title?
Just posted a test one.
But the old ones were there for several weeks before becoming hidden. So I can post stuff; I just don't want them disappearing.