I haven't seen that "reset button" myself, but is there any sort of pedestal point you could push on at the location shown in the video?
I believe in the original video they also said to press down firmly.
Btw, what does pushing on that point actually do? Does it cause something to be mechanically released inside the gimbal? Is there some kind of internal "breaker" that unlatches upon occurrence of a strong mechanical shock, which then needs to be mechanically "reset"?