Albert Maysles was an American documentary filmmaker best-known for the documentaries Gimme Shelter (1970) Grey Gardens (1975).
He is best known for the direct cinema/cinéma vérité – documentaries he made with his brother.
You can watch Gimme Shelter[1] and Grey Gardens[2] in their totalities on YouTube. And Salesman[3] too (practically).
If your new to the Maysles, I’d start with Grey Gardens, the story of an eccentric mother and daugther.