What should be a setting? This specific youtube ambience thing? That is, but it shows the issue - you need to pick a default, and most people won't know they

What should be a setting? This specific youtube ambience thing? That is, but it shows the issue - you need to pick a default, and most people won't know they can change it. Having some idea of the capabilities of the device you're running on could allow you to choose sensible defaults. But if you mean there should be a setting in the browser that websites could check, I agree that could be better.