I have to completely agree with your rant. There are some fun walkthroughs, tips & tricks, hints, myths, fails, mods, stunt montages and other stuff (that I find particularly interesting too), but other than that it's a compilation of videos made by people who yell, scream, lol and fail hard at the game. Something for the most part anybody, who knows the basics of the game can do blindfolded without any skills involved.
Gamers and fans of the series who spent hundred and hundred of hours in this game (maybe doing the same things over and over), absorbing every detail of the game's world and doing what not, will find that as complete fooling around and have a laugh or two, but the people who are new to the series will find that extremely funny and amazing and will praise the makers and continue giving them support and good feed. Not to mention that the same video makers are COD and GTA Online players like OP mentioned. Which I find perfectly fine, since I never tried any of the both and I am not judgmental about the stuff that I have never tried before.
Sometimes when I read the comments section, I can not believe what people post. I am thinking to myself am I going crazy or is this a new era of players who can make from basically nothing (I am thinking about the gameplay, not the game) such a fuss and big deal and bring awareness and attention of people to themselves??? Can anybody please explain that to me how the f*ck they do it? Kudos to them.