Only run in iframes, not on main site

[trlkly]

What's the problem this feature will solve?

The extension loads even if you are directly on the YouTube website. And it is very noisy in the Console, creating multiple errors. It would be nice if the addon would fail silently if running outside of an iframe.

Describe the solution you'd like

Add the following to the top of the script:

if (location.href.includes('/embed/') == false) { return; }

(Yes, I know I could make a pull request, but that is more complicated than a bug request.)

Additional context

No response