Blue
Ravenous Bugblatter Beast of Traal
The DM only has authority as granted by the players - which doesn't extend to outside the game unless they let it. They can say "I'm not running my game anymore", but not a "we will get together in this slot and play Uno and Clue" and shutting down any group discussion. I know you were trying not to bash they guy, but that really seems like a crowning moment of egotism that goes hand-in-hand with some of our worse assumptions about the DM;s demands on the players (and the edited video so no other voices had a platform to be heard on).The Shocking Conclusion?...
So they had their meeting last night. After my wife and one other player said they don't want an overly intense game, the DM said, "Sorry that's all I will run." And then without any more debate said that their D&D game time will now be online versions of Uno or Clue. My wife felt terrible about voicing her opinions and taking away the option of playing D&D. I tried to reassure her that it wasn't her fault for standing up for herself - and it is solely on the DM for taking away their options and not having discussions.
What a jerk.
On their normal channels I'd talk about wanting to continue to play D&D and ask if anyone was interested in running or knew a DM that might fit the nature of the group. But then if this is really a friend they need to be told that they aren't acting like a friend and they aren't anyone in the group's boss to try to order them around. For the long term good of the friendship.