Black box instead of youtube embed flash

Question

I am expirencing a very strang issue. All (or almost all) youtube videos embeded using IFRAME (much like on this page) show themselves as black boxes in my Firefox. All other videos (like the first you on said page) show themselves normally, and I also can watch any of the videos from black boxes on youtube, if I figure out the path.
I use folowing script (run in youtube iframe) to try to find the video:

location.href="http://www.youtube.com/results?search_query="+encodeURIComponent(document.title.substr(0,document.title.length-10));

1. How do I fix my firefox?
2. Is there a better way to find out path to embeded video?

Answer 1

I might be able to give you an answer to your second question. Click the share button under the video; then click the second tab out of the row. It bwill give you a frame to embed your video.