Canon PowerShot SX400 IS Black Manual (en)

You can change how long images are displayed after shots 
Before shooting a movie, lower the flash with your finger. Be 
careful not to touch the microphone (1) when shooting a movie. 
Leaving the flash raised, or blocking the microphone may prevent 
audio from being recorded or may cause the recording to sound 
Avoid touching camera controls other than the movie button when 
shooting movies, because sounds made by the camera will be 
Once movie recording begins, the image display area changes 
and subjects are enlarged to allow for correction of significant 
camera shake. To shoot subjects at the same size shown before 
shooting, adjust the image stabilization setting (
Audio recording is monaural.