This documentary is exceptional. The sourcing and research is more in-depth than many other professional rock docs, especially considering the short runtime. The editing and commentary are well accomplished while the content is interesting and informative. It's good to see a documentary on Black Sabbath that does not perpetuate old rumors or delve too deep into the drug and alcohol issues which are overdone in many other productions. It is important to know the behind the scenes information about scumbag management that plagued Sabbath in their prime. That knowledge is key to understanding the lyrics on Sabotage. Great job by the producer of this video, Alan Berry. Hopefully we'll see more documentary production from him soon!