YouTube comment sections are weirdly positive always. It could be a video of some horrible crime and the comments will be about how great the channel is and encouraging the channel to keep making more videos. When j visit actual fan pages anywhere else online there are always a mix of opinions. But youtube is constantly full of obsequious people
If you do a quick search you can find sites selling google accounts in bulk at prices ranging from a few cents to a couple dollars a piece, depending on the account attributes. I guess SMS-verified accounts with a US phone number costing over a dollar might constitute “hard to bot”, but spammers don’t need one of those to comment on youtube.