[sharing] multiple video play

Hi, in those days me and other people on this forum looked for a multiple video loading method(I don't know if it sounds good).
The most quoted method is to use a big video and get desired frames from it.
I need to play 3 videos at the same time, so I've done this little useful(for me is) patch.
I've done this because jit.matrixset is limited by the RAM amount, with this method you can use random/different movie play with big movie file.

I hope this can be useful.

PS: I've hardpatched some parameters for countdown.mov