I've just created a simple page to replicate what one of our users reported.

The page has several short paragraphs with a total of 3 embedded videos interspersed between them. This displays fine in the output (ie non-CuteEditor view) and in the html view, but in the WYSIWYG view the second video and preceding paragraph are not rendered.

As we don't give our users access to the html view (and most wouldn't want it) this makes it very difficult for them to edit these pages.