Pam -- no wasn't you. Imbedding the youtube is not a problem as it has a proper recognizable code. And the error message happens at the moment the person makes their post -- it won't break later, it breaks in that instant of the post.
FrankieFlash-- sure, sure, likely story! haha. No, we know it wasn't you.
We can locate the actual post.
We can locate it pretty quickly, but unfortunately we can't delete just the post, due to how the error message is -- we have to delete the whole thread. So if it had alot of responses and was important, it just gets squashed.