Which thread is pinned at the top of the Site Feedback category.
You had the right general idea, but you left a space between the url and your attempt to put a “&1” on the back. Which meant that the &1 wasn’t seen as part of the url.
The recipe there for posting Youtube videos is absolutely perfect. It always works without exception. If followed exactly. Like everything else with computers, there are only two kinds of input: perfect, and utterly wrong.