In this lesson Andre Galvao does a short intro about how he begin to use this technique back in the day until nowadays.
Also, the first lesson: Understanding The HippoPlata Concepts. Pay attention on all the details, make your notes and please feel free to ask questions to Prof Galvao on the comments of the video.
Why Hippoplata? Cause you use the weight of your heavy hips against your opponent's shoulder. And the Hippo is an animal with HUGE hips tho haha! You can feel your hip will be as big as a hippo hip crushing/smashing your opponents shoulder. It's a powerful shoulder lock and it feels like an omoplata shoulder lock, but with more intenseness!