Telluride Film Festival programmers refer to its annual feature program, is back this year with a wide array of documentary award season contenders.Muhammad Ali, Arthur Ashe, Jacques Cousteau, Anthony Fauci, Francisco Fellove and the Velvet Underground are the subjects of various docus in this year’s lineup. The nonfiction lineup also includes films about cows, rivers, caves, and family dynamics.The secretive Telluride team unveiled the 2021 program just 24 hours before the festival begins.