I would like to have an introductory video on my homepage, and I'm considering embedding a YouTube player.A problem I see is that, at the end of the video, YouTube will be suggesting other videos. This is a good chance for users to escape the website.Can I somehow modify this end of video page so that it displays a blank screen, or something?
Modifying YouTube end of video page
youtube
Yes.  There's a rel=0 parameter for precisely this purpose, that was introduced in June 2007.  Read the YouTube embedded player parameter documentation for details.