Bellular has a couple of rather different outlooks. The videos on the Bellular Warcraft channel are always overall positive, and tries to find the best parts of Warcraft and talk about them. Meanwhile, their livestream is much more what they *actually* think, which at times comes of as extremely negative. Especially during late 9.0 and most of 9.1, which was a terrible time for the game. If you *weren't* critical of WoW during that time, that's when I suspect a paid shill.
The key to watching youtubers and get some information out of it, is that you have to know the streamer and their biases. Like you should with any critic. A movie review where you don't know the reviewer is pretty worthless, but as you come to know them and what they like, you can get far more out of a review if you want to know if you'll like the movie or not. Same applies to streamers.
The other part of streamers is, of course, if they're entertaining. I've watched a bit of Asmon, and I don't like his style. (And I also disagrees with most of his biases, so dumping him after he spent months making disaster porn out of the depp-heard trial was trivial for me). People say he's smart and knowledgeable, but that doesn't really matter when I a) disagree with him about most of what makes a good game and b) find him annoying more than entertaining.
The reverse would be Taliesin, where, like Bellular, his videos are going for finding the good parts of WoW, and his biases pretty much match my own, especially politically. So much so that whenever somebody is hating on Tali, 9 times out of 10 it's because they don't like his politics and as a consequence I don't agree, at all, with *their* politics and I can easily ignore them.