I really really liked this. I'm sure it's fairly basic for people who have raced for a while, but though I've sailed a few years I just started racing last year. So thank you.
Couldn't hear whether yellow boat would push or pull the rudder to drift down on boat 3 during second minute of video and didn't understand the cacophony of alternative answers given. Did yellow push the rudder?
As long as you are moving sideways with the centerboard up, then pushing the tiller away to aid in that motion sounds like a good option to me, just try not to capsize with that centerboard up.