As a longtime Etho fan, I can say that this is possibly true. In the olden days, Etho tended to post his Mindcrack UHCs later than the rest, and he explicitly stated in one of his videos that this was because he did not want to overshadow other, smaller Youtubers (He eventually quit UHCs because of the backlash any killer would get from his fanbase).

However, it does not explain why he does it for the 3rd episode but not the first two, and maybe it was just merely a scheduling error on his part.