Have a look at this video:
While you are looking at it, pass your mouse cursor over it and notice the appearance of a search box at the top of the video.
This search box violates the prime directive: Shit you do not ask for should not happen. There is an increasing number of such violations: Things that come popping out of a word or graphic just because you get your mouse nearby.
Well, this pseudonym has been quietly passing around information on how to turn the above into this:
When you place the embed code into your blog post, insert the parameter &showsearch=0 at the end of the quoted URL bit (just before the closing quote mark) in each of the two places the URL occurs. Apparently, “showsearch” is on (‘1’) by default.
Evil YouTube. Bad YOuTube.