Mister Babache and three of the world's best diabolists present the methodology of the diabolo in this comprehensive video from Europe. Between the two videos, there are detailed instructions for over 100 tricks along with performance ideas and games.
PART 1: Intro to the Diabolo: Basic starts, handling, rotation, axle correction, tricks around the body, with and w/out handsticks, the "whip" and numerous others.
PART 2: Advanced Diabolo Techniques with 2 and 3 Diabolos: Covers much of the same ground as PART 1, but with 2 and 3 diabolos. Also adds challenges and games.