Nice video, thanks for the work that went into it and sharing.
I've practiced the manuver from 1,000' in a 145HP 172. 50-50 needing to add power to make it back. What makes the differnece I think is climb performance. That old 172 had to fly a fair bit away from the runway to make 1,000' AGL.
The same manuver in my Maule its easy at 1,000', and with my (somewhat limited) skills I can do it down to about 750' reliably.
Many variables. Climb performance, wind, DA, runway length, obstacles, etc. etc.