rockumentary

[ rok-yuh-men-tuh-ree ]
/ ˌrɒk yəˈmɛn tə ri /

noun

a documentary about rock music.

Origin of rockumentary

1970–75; rock2 (in the sense “rock-'n'-roll”) + (doc)umentary
Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2019