It seems to be an interesting game.I think it is definitely similar to leg Volleyball.At least the picture shows that .You tube video is also good but in picture it looks like that is played on the beaches or sand like material
this is not played on beaches or sand like material, but on fibre platform. Coz jumping and kicking the ball at such a height wouldn't be possible on sand.
iv'e seen this in the Philippines..one of their sports their at high school....it's called "sepak takraw" ..... composed of 3-6 players each team..but on the court only 3 players are allowed on each team...they are so talented and skillful in playing this game... try search it on wikepedia.. type sepak takraw