All these two ever do is talk about penis, yell into their microphones, sing horribly, and talk about stupid shit not pertaining to the game all while sucking at said game. I mean.. They said Castlevania IV was impossible for shit's sake.
I don't watch the show for the reasons you mentioned. Though I see it's more tolerable without JonTron who's entire schtick is just an (admittedly good) impersonation of Timon from the Lion King. But apparently they did a playthrough of CV1 before and think CV4 is unbeatable? I don't see how that could possibly be unless you either cheated or played the GBA version of CV1, which saves your progress.
Hm now that I think about it more, I guess that's where alternating who's playing would come in handy. When one person gets fatigued of trying to beat something the other can take over for a while. I remember I playing Spyro and Crash Bandicoot that way as a kid.
PS - I just remembered Egoraptor made this.
Sequelitis - Super Castlevania 4wat. So either he never actually finished 4 before making this video, or he's playing up CV4's difficulty to pander to the audience.