Before YouTube and other online apps, Earl Cagle from Point 39 Productions made some of the best High Powered Rocket videos around.
Extreme Rocketry did an interview with him that I though was worth sharing:
Earl Cagle Jr Interview by Extreme Rocketry
Here is one about the creator of Aerotech too:
Gary Rosenfield Interview 2000 by Extreme Rocketry
Frank Kosdon passed away several years ago. He was a very unique person and created some amazing motors. Some reload motors are still available through Aerotech: