Yeah an exhaust might be it... It literally sounds like its coming out of the motor mount, so maybe the manifold gasket is bad?
This whole things has been weird, I took it to a good shop and they said try the tensioner and idler, and then autozone sells me a bad tensioner ***. (dayco - pos) which snapped and the water pump started leaking. It leaks here and there, not all the time which is strange and I couldnt see exactly where the leak was coming from. I think the water pump is done for but this sound in the clip is a different sound. Isnt the ac tensioner on the pass. side? I sprayed down each pulley one at a time and the sound was still there... like I said it sounds like its coming from directly behind the alternator.
Thanks guys and if any of you are near LA and willing to take a look let me know.