Ven. Vimalaramsi is a somewhat notorious character who has made some strange claims in the past and talks disparagingly about other teachers.
At this time there's a very long thread on dhammawheel.com that started with discussing his youtube video and quickly devolved into a flamewar. You might find it interesting if you want to form an opinion of the guy.
http://www.dhammawheel.com/viewtopic.php?f=14&t=7375&start=0(Edit: that is not to say I personally don't like the guy. What he says seems like good stuff to me, and dhammawheel.com is mostly hardcore Protestant Theravadins who, for example, really hate Dan Ingram. Still, it's useful to know other opinions)