Hello.
I have made this guide to make peoples lives ALOT more easyer. the one program u need to make and also UPLOAD is Xfire.

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To start 1st download the program from www.xfire.com
2nd once downloaded Install the program and run it.
When Xfire starts up it will give u an option to register, do this.
100% FREE!!!
Then Log in.
After You are in open up the options- Tools/Options
Click on the Video tab and make sure the enable video capture at the top is checked.
you may choose a folder to save the files and what keys to press to start it.
There are many other options which u may change but the defult options work good.
----BEFORE U GO ON-------
make sure that the key binding(what keys u are going to press to start the video capture) are set to what u want.
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Then just log in start the game and press the key binding you set to start the video capture.
After you are done press the key binding again and that will end it.
in the top left once u start the video it will keep track of how long the video is.
when u are done it will say saving. wait for that to end then exit the game.
To upload the video just follow the instructions that pop up when u exit the game.
Vist Xfire and try it now!!!