The band is responsible for that scream at the end. They seemed to be having a very good time. From their website: The name “The Late Ones” pays tributes to all of the late and great revolutionaries who have come and gone such as Bob Marley, Tupac, Jimi Hendrix, Steve Biko and John Lennon. It is the fusion of each revolutionary story, struggle, and message that inspires and resonates with The Late Ones own journey and love for all genres of music. Built on this deeply rooted conviction, The Late Ones harness something undeniably special in calling for Justice, Freedom and equality with their music.
No Beatles tribute is complete without The Residents! Released as a 7" single called The Beatles Play The Residents and The Residents Play The Beatles. A sound collage consisting entirely of Beatles samples. More info here: https://meettheresidents.fandom.com/wiki/Beyond_The_Valley_Of_A_Day_In_The_Life