Haven't watched this yet, but is this even ethical given he plays ppl every day for a lot of money? Or has he agreed to this like Isildroons HU opponent? 

I assume he agreed? About the video: Phil, in the middle of the video (or 2nd half) you bet 4s3sQh2d on turn again on 4hAdJdQc...your reasoning is protection (i think). I think even if he c/c any QT/KT or A,J (which is over 50% c/c on flop) we are under 50% and will constantly value cut ourself so is betting that weak of a hand really optimal here. That said: What kind would you check back to protect you river range if you bet any 2pair? I think same scenario happened a bit later where you bet bottom 2pair on AJ9fd x on turn. Thanks.

Bulltios, isnt he a multiaccount anyway?