Why I like mashups

My kids showed me this, although it's been around for a while.

A classic Run-DMC song. A Cossack dance off from an old Soviet-era b&w film.

and a quick question

just in the last week to ten days, links to video clips have ceased showing up in my Firefox browser. If I go directly to YouTube I can still click on a link, but embedded links are no longer showing up. I just get white space. Even the one I embedded myself, in the post below, is not showing up.

I'm wondering if there is some odd little thing I can go in a switch to get them back? Or? Any ideas?