The first CSS video says "the property and value are separated by a colon (which she pronounces "colin") as the head of some guy shows up in that position, then

The first CSS video says "the property and value are separated by a colon (which she pronounces "colin") as the head of some guy shows up in that position, then the narrator says "no, not that Colin". I don't recognize the guy, but I'm really bad at recognizing celebrities. Who is that face, and is he somebody who would be well-recognized in the UK? Direct link to the relevant video snippet: http://youtu.be/HFmaW5WYxe0?t=1m1s http://youtu.be/HFmaW5WYxe0?t=1m1s