I don't know about gaming or exactly what you are wanting to do... so my reply would not be of any help.
The animation is pretty dark and a bit hard to figure out - anyway, I hope that you get some info that will help.
My experience with facet (edge) modeling is that you ctrl+drag an edge to make more facets that are connected. There is some welding of edges and points as you continue. Anyway I don't know about low-poly gaming animations...
