There is no definitive proof on how many users watch videos on Facebook with the sound on (though this number is estimated to be 85 percent), although Facebook now autoplays videos on mobile with sound.

The setting can be disabled, and videos can play with no sound on mobile if a user’s phone is in silent mode.

Captions can help users understand your video, even if there is no audio.

This helps to decrease the chance of losing the user if they can’t understand the video without sound.

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