In terms of quantity gaming is thriving on Youtube. In terms of quality it has been dead for quite a while. Let's face it, gaming is a limited market in terms of creative freedom. You can do your roleplay stuff, montages, let's plays, playing the game with a weird kind of control mechanic and all that, but you can't just stomp new things out of nothing as the game is your baseline. There is nobody that has been doing anything new in the gaming section, which is why horrible content like theonemanny is able to thrive. People are so bored out of their goddamn mind that they are blown away by a dude who uses some software to make himself look like a talking dog. That is what gaming on YT (and Twitch) is nowadays. People playing silly characters to set themselves apart.