There is commenting and there is "Oh, lol, I jumped, now I landed again, what are we gonna do now, hm, let me take a step to the left, yeah, that's nice, now-boom, haha, shot him, why don't you die olol, gonna shoot him again, haha, my head is about to explode because I have to say things every second rofl, 15 seconds done, now to find something equally engaging for the next thirteen hours of episodes, oh lord, the internet has been waiting for this..."
ENOUGH!
Surely that can't be the point of Let's Plays as prevalent as it may be in that genre!