Dear Patrick,

make sure that there are no spaces at the end of the text just before the video and check also the margins ( step 3, under "current page ...." there are 8 icons, and the third starting from the left "Set the cell's inner and outer margins" will allow you to modify the margins of the objects in the page). You should also update the version of the software, since I saw that you are not using the upadated version of WebSite.

Ciao