Mastering the Mount, Vol 4: Bonus New York Seminar
Roger's seminar version of the system: low-mount lockdown via crossed feet and head hug, the half-choke that's already set, the cross-arm defense gap that gives away the choke, and the suffocation → body lock → second arm trap → high-mount armlock chain that runs both sides until he taps.
This public BJJ flow maps techniques and transitions.