KFUL is only around 3100’. The likelihood that this guy was above blue line (I’m pretty sure it’s 112 kias, but it’s been a long time since I flew one), was probably nil. If you look closely, by the time he rolls upside down his gear was already up.
I think he was getting ahead of himself, lost his left engine at rotation, well below Vmc, and suffered the consequences of doing something other than pulling both and putting it back on the ground.