Ive tried to make a video but i dont know how (or i just cant)

so... i think it goes like this:

1. i save a repaly

2.i use movie.lua script

3.when i have filmed my movie, then there pops up message like this:

Creating MPEG movie. program will freeze during create.Please wait
running ffmpeg and saving to 8638_movie.mpg

Before you start filming there reads that movie is created in your toribash directory

But i cant find it anywhere!!!

is that movie in sum other directory or did i do sumthin wrong??

plz tell me!