To Sir, With Love (1967)

Starring:

• Sidney Poitier
• Christian Roberts
• Judy Geeson
• Suzy Kendall
• Geoffrey Bayldon
• Faith Brook
• Lulu
• Faith Brook
• Christopher Chittell

Storyline
American Mark Thackeray (Sidney Poitier) recently received his degree in engineering, but cannot find work. To make ends meet, he takes a job as a teacher in a rough London East End school populated mostly with troublemakers who were rejected from other schools for their behavior. While the students at first see Thackeray as just another teacher open for ridicule and bullying, his calm demeanor and desire to see them succeed gradually earn him their respect.

Richard Pryor Live In Concert (1979)

Starring:

• Richard Pryor

IMDB.com
As others have said, this is the best stand-up performance ever recorded. It sounds like an exaggeration, but it's not. Pryor is a comedic genius, and you can see his influence in every comedian since. He sets the standard. His facial expressions, acting abilities, delivery, etc., are all top-notch, and he can make even mundane topics such as walking through the woods pee-your-pants hilarious (in fact, he spends a long time talking about the woods, which is a bit puzzling, but hey, it's funny). He also covers completely unrelated topics such as dogs, drugs, family life, boxing, and sex... all the while being hysterically funny. The guy is amazing, and I recommend this to anyone who enjoys stand-up comedy.