Similar to IRC, where I never found nice usable apps for my taste, I thought XMPP was deprecated, but that doesnt seem so?
A very easy to use phone app is #Snikket. When I force normies to reach me over XMPP, I generally suggest Snikket to them. For the desktop I like the text UI of profanity. But it is glitchy and would be hard to use for anyone who lives in the shelter of a GUI.
#Matrix is theoretically decentralized but the mere fact that the flagship instance is on #Cloudflare suggests the developers are not on the ball about privacy or digital rights. Whenever I have been asked to join a Matrix room, there was reference to that Cloudflare instance, so I refuse it.
#Signal has many problems. I won’t even consider touching it as long as supplying a mobile phone number is a registration requirement.
(btw, i did not see the youtube video so I don’t know if it covered the problems I mention)