[picture removed due to my increasing disgust with linked content presenter]
Watch it. Watch it all. You'll have to power yourself through it, unless you are just as toxic as the creator.
Take note of the self-styled opinion the presenter has about himself: that he is "great." Take note of the repeated cognitive dissonance as he justifies each action he advocates, then rushes in to qualify that justification, only to then dismiss the qualification he's just made on the basis of doing whatever feels "right" at a given moment.
Take note that the individual clearly has no concept of his own humanity, his foibles, his limitations, his arrogance or his biological limitations in judgement making.
Then, once you've completed the video, if you still have the stomach for it, read through the cheering, praising, vociferous panegyric of the DM's belief system and opinions, filled with unrestrained awe and love.
The picture is one of a community so bereft of good sense, so lacking in perspective or any knowledge of effective human management or person-to-person respect, that they are ready to lunge for this leaden life preserver of an emotional despot in the hopes that they won't drown in their campaigns. To a responder, it is clear that none of them run a good campaign, that each and every one is merely a perpetrator of the same noxious habits of the presenter, seeking nothing less than affirmation and a pat on the back for being injurious, self-absorbed, indifferent assholes themselves.