In brief, the thesis of this video is: 'the machine is the cycle of advertising dollars paying for "engagement" rather than anything more meaningful. This leads to optimizing for "engagement" which results in the creation of polarization rather than the polarization happening first and the unpleasantness afterwards. Notice the machine. Talk about the machine. Then we can decide what to do about it.'
Put this way, it sounds like a paperclip maximizer - except that the "paperclips" are human clicks.