Canon EOS REBEL T3 Basic Instruction Manual page 224

k Shooting Movies
When you set the shooting mode to <k>, you can easily shoot High-
Definition (HD) movies with autoexposure. When playing movies,
connecting the camera to a TV set is recommended (p.184, 191).
Recording movie
Microphone
140
1
Set the Mode Dial to <k>.
X
The reflex mirror will make a sound,
then the image will appear on the
LCD monitor.
2
Focus the subject.
Before shooting a movie, autofocus
or manual focus (p.128-135).
When you press the shutter button
halfway, the camera will focus with
the current AF mode.
3
Shoot the movie.
Press the <A> button to start
shooting a movie. To stop movie
shooting, press <A> again.
X
While the movie is being shot, the
"o" mark will be displayed on the
upper right of the screen.