Since I was asked once again on a Listserv, I thought I'd re-post this.
To keep ads from popping up after your video you can add a parameter to your embed code.
Here's a link to give you a clue: http://illuminea.com/remove-related-videos-from-end-of-embedded-you...
*Basically, you add the parameter:
... which means no related videos.
Original post was in a comment: