And here's another solution..
Copy the files in data\bin\ of toribash 2.76 and paste it in your current toribash folder(2.7
in data\bin\
voila, you have two files in Toribash-2.8\data\bin
one is ffmpeg the other is a DLL..
Run toribash and follow standard procedure in making a movie using the movie.lua script..
or if you dont have toribash 2.76..
download it here
The link says 2.75, but when i installed it, it was 2.76.