Not completely sure on this one, but it's fairly common these days for groups and artists to release DVD singles these days along with a CD1, CD2, 7" and 12" versions in the UK. Since the singles market in North America is not nearly what it is overseas these usually don't get released over here. You'd be surprised about just how much cool stuff gets released in the UK that we don't get over here. That's what Amazon.co.uk is for!
If you do want to get these region 2 DVD singles, you gotta have the right player obviously. I use my friends laptop!