Seems like a lot of us are shooting BBs this summer! It's a lot of fun. Here, I'm shooting with a single, cut #64 office rubber band on each side with a small leather pouch. This is an easy replacement for the original tubes, which are totally unsuited for small ammo like this.
I think this draw is in the neighborhood of 36 to 40 inches and feels a little awkward since I've been shooting butterfly. I see from the vid that I have to work on my form with the shorter draw. It looks good until the last bit when I drop my elbow noticeably. Note to self: Pull with back muscles!