I like written reviews because they can give me an opinion on a 30-40 hour game, often holistically. They also try not to spoil too much. They do this in about 10 mins of reading time.
Watching a stream gives you a good slice of the action but, unless you watch the whole game, you might not get a feel for the overall experience.
Both do different things and are valid ways to research a game before buying.
However, deep thoughtful criticism of games can raise them above simple entertainment products and starts to elevate them toward art. This isn't always written and is also done through video essays. But I'd group it all as traditional criticism.
As for Ybarra. I think his comments are a little off. If the game doesn't explain a mechanic to you, then you'll be confused by it for a while. In something like Dark Souls, that's what you sign up for and is part of the experience. I don't think Anthem is aiming for that though so it's just poor design.