Music plays on one website, but a familiar video on another stays silent. That comparison narrows the investigation; it does not prove which setting caused the problem. Start with the player and the affected site before resetting the browser.
Check the player you can see
Start the clip deliberately and inspect its mute button and volume. A paused video and a playing video with muted audio need different actions. Use a short, familiar clip so you know when sound should occur, and begin at a comfortable listening level.
Chrome’s media controls can help you return to the tab that is actually playing. Confirm the site address rather than changing settings for a similarly named tab.
Inspect permission for this site
In desktop Chrome, open the site information control beside the address, choose Site settings and inspect Sound. A site-specific permission can override the default. If it is blocked and you want this site to play sound, change that permission and test the same clip again.
The broader sound setting is in Settings, Privacy and security, Site settings, Additional content settings and Sound. Check it when several sites are affected. You do not need to allow camera, microphone or notifications merely to hear an ordinary video.
Keep a useful comparison
Change one setting at a time and record the previous value. If the site remains silent, compare another known clip and the computer’s selected audio output. Sound in another application does not establish that Chrome’s own volume is correct.
When the change does not help, restore the setting you changed before trying the next explanation. Avoid clearing all browser data or reinstalling just to test one site’s sound permission.