So I click on it and it plays in the other tab. But the original window and the familiar red YouTube arrow are GRAYED OUT and unusable. I don't know what's going on, but it only does this in Firefox. I'm attaching two screenshots, one showing the original YouTube video page, and the other tab page in which I play the video. Since when does YouTube make you open another tab to play a video? It should play right IN the same window at the page I selected!