Instructions
Start "The Sims Life Stories" and load the family of Sims you want to feature in a movie. Once the game finishes loading, you will be placed on their property and the game will be paused.
Press the "Tab" key to enter "Cameraman" mode. You will have increased movement with the camera in this mode, which you can move by using the "W," S," "A" and "D" keys.
Press the "V" key to begin recording your Sims. This will allow you to record the actions of your Sims without the cursor and interface appearing in the film itself.
Perform the actions you would like to record. You will have to move the camera yourself if you want to change camera angles.
Press the "V" key to stop recording and save the movie. Depending on the length of your recorded video, the game may pause for a few seconds to a couple of minutes as it saves the video. Once finished, the video, which is located in the "Movies" folder of your "The Sims Life Stories" directory, can be immediately uploaded to YouTube.