He's obviously under mind control. Even if it's his own mind. But mind is evident in his talk.
So, as always, your personal discernment filter is needed.
My personal opinion on his talk (first part of 6 videos) is that he has most likely shot "up the pole" and come back down, and so does have some valid viewpoints on what's there and what underlies reality. But as often happens with a "one shot" ascension, it didn't give him enough experience in accustoming himself with what it's all about on the various plains of existence.
That left him with the option of using comparisons from his mental frame of reference, and his prior religious/mystical indoctrination or education, to try to describe what he saw on his journey into multi dimensional existence.
What he saw was real, but his explanations are from a 3D viewpoint, primarily.
There is no harm in giving what he says a good look, in my opinion, but you do have to use your heart centered filter to screen out the mental additives to the more pure truth he describes, so as not to confuse the underlying truths with his minds attempts to "make sense" of the experience.
For instance, his viewpoint and description of the various stratified "levels" of multi dimensional existence is partly accurate, and partly inaccurate. The levels are not stacked in "ladder" form, one to the next, and to the next, in sequence, etc. It's not like that at all. All those dimensions are right here, right now, and can't be any other way. We simply tune in to the frequency of which ever one we want to interact or perceive on. Much like you'd tune in a radio station.
It is however nice to see how the number of people who are experiencing multidimensionality and coming out and trying to drop the proverbial bread crumbs for others to follow, grows constantly. It's getting easier every day now, to encounter a much more accurate description of our true nature, and hoops we have to jump through to try to stay submerged in 3D lego set.
http://en.wikipedia.org/wiki/Lego