In this video Rob Biernacki breaks down what a BJJ wedge is and how to use it for armlocks, chokes, leglocks and pin escapes. If this style of teaching appeals to you then check out https://www.grapplearts.com/the-bjj-formula/

And for a preview of an analytical breakdown of the modern leglock game watch this video on Youtube: https://www.youtube.com/watch?v=I_sY0rUAyP8