Loops are made with cue_points
here's an example of how to loop a video:
1000
0,0,start
2000,1,loop_point
3000,2,loop_start
11000,0,end
So, no NCSoft didn't invent anything
save these cue points in a .txt file and select it in the ScaleForm video Encoder, it just works
P.S. Happy new year!