video worked.
did it top itself? i've seen a terminal node split into 3, magically. Or, did you see any tri-leaf mutation, previously?
if you blasted the shit out of it with light toward end of stretch, could have a few nodes tightly spaced.
Any possible damage to terminal at the 'right' time could cause a 3+ headed bud . no different than a fim, really, but with bad timing.
can't tell for certain from pictures or video.