It seems that the video is pretty convincing to some because it was paused and commented on all in a negative sense to Floyd. (part one did not play for me but part two did, and all I watched was less than a minute of it). But I remember watching the fight, and rooting for Hatton, and watching Floyd dismantle him from outside and inside.
Floyd had nothing to do with Cortez. He was hitting Hatton at will for most of the fight. It came to the end and Hatton had Floyd pressed against the ropes, Floyd seemed to not mind it, and basically beat up Hatton with his back on the ropes, shoulder rolling and countering him to death. He started banging on Hatton pretty good, Hatton had to back off and Mayweather dropped him with one-shot. Hatton got to his feet and mayweather commensed to beating him up, until Hatton looked like and dead man on his feet. Honestly, that is what I remember of the fight, and I don't remember at the time thinking "man, this Cortez is in the way".
Paint it how you like but Mayweather beat the crap outta Hatton, and I was not sure if I remember any one on the Hatton side asking for a rematch.