Aesopian has a podcast which touches on the blue belt blues.
One of the original MMA Documentaries and the first once I recall that truly put a human face on the sport. It sadly also would be a precursor to the sad realities of the addiction and depression that would slowly begin to claim fighters:
In case you're too young in MMA to remember, the heyday of Fedor's prominence in global MMA cannot be overstated. It was truly an awesome time, and I'm grateful I had the joy of experiencing it.
Koga nearly winning the All Japan Open Weight Championship. Mindblowing.