From his own YouTube's Channel description:
Hi there 👋 If you're new to my videos my name is Matt D'Avella. I'm a documentary filmmaker, entrepreneur and YouTuber. I've made a couple documentaries for Netflix. I also teach courses on everything from filmmaking to habit change. If you like to nerd out about self-development as much as I do, you can subscribe for awesome videos.
If you like my videos, you might like my courses where I go even deeper into topics like self-development, creativity & filmmaking: http://slowgrowth.com
He is one of the best self-development youtubers out there, and if that interests you (maybe that is the reason you are here in the first place), you should really go check him out @https://www.youtube.com/@MattDAvella/featured