Unless something has changed, you have to pay for YouTube premium to play audio while the screen is off.
YouTube is also a worse choice if you want offline access, such as on an airplane or when camping
YouTube is also a worse choice if you want offline access, such as on an airplane or when camping
https://addons.mozilla.org/en-US/firefox/addon/video-backgro...
There are many sleep videos which have a dark screen for this reason, you can add "dark screen" to the search terms and see the choices. Although it's not quite the same as having the screen off, it's close enough in my experience.
NewPipe (from fdroid repositories) can play audio from YouTube while the screen is off.
This functionality is in no way specific to Brave browser.