This is a great little drill that will help you to learn how to shoot a beach volleyball and see your opponent while you are making a shot.
The video shows it perfectly, sop not much to add apart from emphasising the importance of the coach in this drill. The coach should make big moves, so that he/she pushes the player to hit close to the line. It’s no good hitting a ball perfectly to the coach if he is standing 2 meters inside the side line. That is not the sort of shot you want to practice.
So if your coach is on the angle, make sure you practice your best sharp angle shot, not just an easy shot that the coach can catch. In most cases you don’t want to practice shots that land anywhere further than 50cm from the side line.