I believe you're right! I can't think of any extension that would be able to modify the picture of a stream itself in real-time. What came to my mind was the ki

I believe you're right! I can't think of any extension that would be able to modify the picture of a stream itself in real-time. What came to my mind was the kind of 'picture-in-picture' video that some questionable news sites display as you scroll down an article, usually a distracting broadcast which is barely related to the news itself.