FUCK i listened 75% of it with 7.1 headphones and the beat was so luod and started to feel my body lighter. then i started to readcomments you shoul us stereo or mono.. LOL.  no beat now but i am just starting again. Interesting that 7.1 headphones make a beat and a sound like waves trought your brain. WEIRD!!! and scary. now i am listening in stereo to check differnces.
PD: i think that bass bost and other effects by your sound card or headphones must be for this. but i will check them too
It's definitely not in the source video :) killing all the annoying filters isn't always easy, but it is possible... maybe it'd be easier to try with another device or el cheapo headphones?
Dio