depends on what part of the video you are talking about. He does some waterfalls and some other stuff I havent ever seen before but Im not sure if its a lomcevak. Doesnt look like it to me, jmho.

If you had a rod run through the wing exposed on both ends and then put the airplane on a spit(cooking term) and flipped the plane forward over and over on the spit, like cooking a pig on an open fire,,, thats a waterfall except in flight it may lose a little altitude and you cant eat it.

A KE spin looks like a waterfall except the wings are vertical and the plane falls like a turd in a well while it is happening. Waterfall wings horizontal, knife edge spin wings vertical..

He does a cool looking maneuver where the plane is waterfalling and travelling sideways on the rotational axis[8D], but the plane never flips end over end and never ends up flying tail first which is where a lomcevak is supposed to end up, at least thats what I have always understood. Whataever he is doing it is WAY cool and I dont know how he is doing it..