Nokia Lumia 920

Press the Camera key.

Press the video recorder icon.

To zoom in or out:

Drag two fingers together or apart to zoom in or out.

To turn on video light:

Press the video light icon.

To select video size:

Press the dots in the bottom right corner of the display.

Press video settings....

Press the field below Video mode.

Press the required setting.

Press the Return key.

Point the camera lens at the required object and press the Camera key to start recording.

Press the Camera key to stop recording.

Press the Home key to return to standby mode.