Max Roach, "Garvey's Ghost" YouTube. I have this on a vinyl compilation, Impulse Energy Essentials
Automatic Man, "My Pearl" YouTube. If Hendrix had lived he'd likely have done a mix of prog and funk that sounded like this.
MX-80 Sound, "Crushed Ice" YouTube. From Hard Attack, a better album than the later pair on Ralph, only available as an import at the time of release.
MX-80 Sound, "Tidal Wave" YouTube. "There's nothing left but kids in vans, without pants, and they're eating pork."
Orchestra Luna, "Were You Dancin' On Paper" YouTube. Quirky Boston ensemble combining prog and showtunes.
Orchestra Luna, "Little Sam" YouTube
The Bizarros, "Artie J" [MySpace link removed -- bad idea] Akron!
Bonus: Network Awesome has a great collection of Can YouTubes. For those who followed the band only from vinyl across the Atlantic back in the day, it's fascinating to watch their evolution from hippie collective to the "art disco" period. Another revelation was Irmin Schmidt stepping up as stage showoff after Damo Suzuki left. Somehow I imagined him looking ponderous behind his keyboards but he's out there mingling Sun Ra theatrics with lively dance steps.
Debussy, "Sonata for Violin and Piano," David Oistrakh (violin), Frida Bauer (piano), live recording, 1972 YouTube My favorite Debussy piece, confidently executed.
Soul Odyssey, "Rapture" YouTube - Progressive house tune produced in Dallas TX (1993), when I was living there and taping Jeff K's KDGE show. Discovered by Sasha and became a global club hit.
Central Fire, "Shout Going Out" YouTube