As someone who enjoys PewDiePie's comely personality and (lack of) puzzle-solving skills, perhaps I was asking for trouble clicking on this. I had a general idea of what I was about to see. Thankfully I feel like this parody was a lot more tasteful than it could have been. I guess the first thing I can do is get into the technical details.
The graphics are alright, but come off as somewhat irritating. The wonky proportions have a wildly expressive quality to them, which serves a purpose, but tends to annoy me the way an itch does - in a persistent, nagging kind of way. This isn't because of the content, but rather just the style and the way I react to it. There are some brilliant political cartoonists on Newgrounds that use this art style, and even when I agree with the message the style still rubs me the wrong way. The animation was only an extension of this, being well-done but similarly surrealistic.
Sound quality was definitely my favorite part of the animation. Many parodies go way over the top with parodied voices, which can work but usually doesn't. Typically the mocked voice acting is more of a distraction than an augmentation of an animation, and only really helps when the original people being made fun of have some speech quirk to begin with, but I'm glad that the voice acting kept the focus on the jokes you made. Although if you wanted to you could have easily made fun of Felix's Swedish accent. Subtle as it is, you might notice that he can't pronounce a 'ch' sound. (Shocolate, shair, shopnese, etc.)
By the way, the fact that you slipped in Satanic by Richard Harvey during the Amnesia parody did not go unnoticed. I fucking LOVE that piece, you should have cranked up the volume on that one!!
Now, animation aside, I'll try and go into the main things you picked on Felix for.
1. Having too many channels - I'll agree this is obnoxious with other channels, Smosh in particular. I think we can all agree that the Spanish Smosh is thoroughly awful. Although considering PewDiePie only has two channels, one of which he never uses anymore anyway, It's kind of a hollow insult when directed at him.
2. Playing popular games - Just about every Let's Player on YouTube has trouble doing this. People demand both popular and indie games, and no matter what happens, tons of people end up being upset/critical over it. As someone who does follow Felix's videos, I think he does a fairly good job with his selection, allowing the 'bros' to pick out games themselves while simultaneously providing pretty good options (Indigo Prophecy was definitely a good choice, being both obscure but having its own cult following). Simultaneously, videos like Happy Wheels and Amnesia videos are done less frequently because Felix has expressed that he has a personal quality standard.
Overall the 'humor' in this animation simply didn't hit home for me. It wasn't annoying, like stuff by EgoRaptor, for instance, but at the same time I feel like watching this animation was really a waste of time. Frankly I didn't get anything out of it.
(By the way, if you want to see some really good retro PewDiePie videos, I suggest the Amnesia custom story Killings in Altstadt and Barbie Adventure.)