Bret 'the Jazz Video Guy' Primac posted a video on his site that features Gary Bartz talking about his time with Miles. Bret also has a 334 videos on YouTube that are worth checking out.
Don't Call Me a Jazz Musician- Bartz on Miles
Bret's YouTube channel
Here are a few of my favorites:
Eric Dolphy "History"
The Universal Mind of Bill Evans
Parrot sings Horace Silver
Hans Groiner- episode 1
Ethel Smith plays Hammond