It's not video, but if you like seeing hair grow out and haven't seen it already, you should check out Nadja at longhairfoto.de:

longhairfoto.de/G-Changes.html

Hopefully, she'll grow her hair out at least half as long as it was before she cut it, and hopefully Frank will keep doing photoshoots with her.

longhairfoto.de/G-Longhair/31-Nadja/index.html

Though it may sound strange at first, if you're into the dramatic change of hair growth through time lapse, you may also be able to enjoy the dramatic change of seeing long hair cut. It's really the same thing in reverse (minus the time commitment by the girl of course), and there is much more video material out there. I'm mainly a long hair guy, but I find a lot of satisfaction in the bittersweet emotion of watching beautiful long hair be shorn.

To start out, I'd stay away from the coarse/disrespectful stuff (i.e., Maury Povich). Here's a couple of nice ones. A beautiful young woman with knee-length blonde hair goes short: