I have found some decent Quicktime Clips of girls with braces at:

https://dereferer.me/?https://dereferer.me/?http://creative.gettyimages.com/source/Film/filmresultsmain.aspx?source=quickSearchFilm&txtSearch=braces&doRF=True&doRM=True&usePrefs=False

-UNCheck 'Braces (Orthopedic Equipment)
-Check 'Braces (Dental Equipment) and search.

You have thumbnails and can click. After clicking the thumbnail, you can click on the 'Play' button to play the clip, they have no sound, but are very nice to watch, nice girls with braces smiling away. My favourite is the one '686-1' the girl looking lovingly into the camera and smiling, showing off her beautiful ceramic braces!  

I just need to ask a favour:
If anyone who is more technically skilled post direct links to the source of the clips so we forum members can download these beautiful clips, the help would be very much appreciated.

Thank you and enjoy!