Cathe Friedrich's Kick Punch & Crunch. This is an excellent kickboxing video for intermediate/advanced...it has great variety and lots of options.
Top Cardio Videos. This page lists some of my all-time favorite cardio videos.
Collage Video. This is one of the best sites for finding all kinds of exercise videos.
Video Fitness. Before you buy, visit Video Fitness to read detailed reviews of hundreds of videos.