I know this is an advanced technique but after doing it without really knowing I did at the time, I see how effective it is. Any suggestions on who to look at or any training videos related to it? It is pretty simple IMO so may not take a whole lot of explanation other than just timing and practice.
Freddie roach has videos on this drill which he taught klitschko, your right it's effective. Watch James toney move his head with the punch. https://m.youtube.com/watch?v=qvcLEbagkvQ
Your head naturally slips when you throw a right cross. If you're pulling your opposite shoulder in the opposite direction of your lead hip, it's easier to do. Let your hips guide you.