Longsword Grappling: using the left hand

A question came up in a Facebook thread about the frequency of using your left hand during grappling. This is video is merely a compilation of clips that I had available that use the left hand to control the opponent during a grapple. My grappling 101 advice for students is as follows.
When closed to grappling distance:
1) Let go of your pommel with your left hand
2) Grab or shove the nearest body part or sword
3) Hit them with the sword
Works 9 times out of 10.