Video has no sound

If you are not hearing any sound at all from your device:

Windows: See Fix sound problems in Microsoft's online support documentation.

Note:

Running the audio troubleshooter may help resolve your issue, but it requires administrative access to your computer. To run troubleshooting steps that may not require administrative access, click the Run troubleshooter drop-down.
macOS: See Get help if the internal speakers on your Mac don't make sound in Apple's online support documentation.
iOS: See If you hear no sound or distorted sound from your iPhone, iPad, or iPod touch speaker in Apple's online support documentation.
Android: To ensure that audio isn't being sent to the headphone jack, plug headphones in, and then unplug them. If the problem persists, contact your carrier.