I think Eric is alright. Yes, he has Barret's, but from all OFFICIAL reports, he's actually doing a lot better now. Anybody who frequents the SM board who is familiar with "Adam" - the forum admin, also should know that Adam is a VERY good friend to Eric and talks with him quite constantly. Matter of fact, EC has been helping Adam with producing Adam's band's first album.
If you go to page 2 of the thread entitled, "A Message from Eric Clayton" on the SM board, you'll see Adam's response on Thu Sep 10, 2009 3:24 pm to all the speculation, in which he states, "FYI - ERIC IS NOT DYING! At least not at any faster rate than anyone else."
Based on Adam's comment, I'm going to assume that the tone of Eric's video message is just Eric satisfying his obsessive penchant for all things "Theatrical". For what reason is anybody's guess.