I was talking with a friend tonight, with whom I had attended a "James Brown and his Famous Flames" concert in the mid 60s, and we agreed that it was one of the great experiences in live entertainment, even to this day.
Here's an 18 minute video of their legendary performance at the 1964 TAMI show. The "Night Train" finale is an astounding display of music, song and dance.
https://www.youtube.com/embed/WMqM4lZGiK0