The Trap Guard is a great tool to have in your game, especially if you don't like playing traditional closed guard. It keeps you safe (even from punches) and will set up a ton of attacks and sweeps.
This part of the series is all about sweeping your opponent from the Trap Guard. Obviously, there are tons of submissions you can hit, but you always need a good sweep in the series. Hitting sweeps from here is easy because they will generally be pushing in and you have so much control. He shows a lot of different options for body types and how your opponent reacts.