Occasionally I fall asleep and awake to a channel like this, usually one showing science television content with an extremely active stream of real-time comment

Occasionally I fall asleep and awake to a channel like this, usually one showing science television content with an extremely active stream of real-time commenters. This gestalt of this channel is nearly identical. Has anyone written up an explanation of these vaguely (or not so vaguely) scammy YouTube channels? Or posted a YouTube video, more likely?