I am looking for a file converter that is free that i can change a toribash replay into a file that will work for windows movie maker

something like this doesnt exist.
u have to record the replay ingame with a tool like fraps.

i have some thing like that but everything is slow and doesent look really good

Then tweak your graphics settings and find a decent recording program.

Or get a better computer

Convert whatever you want to convert here:
http://www.online-convert.com/

i got it i am making a video right now but i have to use a screen recorder

try obs its free and there's no lag
it cant be done to convert rpl to video cause its on a diffrent universe!