This is a throwback video to before the St. Albert location, when Professor Tyson was teaching a class called Elemental Jiu-Jitsu at the North Edmonton location based on his book. The video outlines three basic armbars from the guard with three very different styles. The armbar from the closed guard is one of the most important tools to develop for white belts. Opening and passing the guard takes focus, especially against a strong opponent. By threatening the opponent with submissions from the closed guard, you can split their focus between defending the submissions and passing, making their pass less committed and effective. Also, due to the nature of the submission, opponents will often hunker down in your closed guard to avoid the arm being straightened. This makes it easier to go for sweeps and other submissions.