Buenas! tambien puedes comprarlos por ebay:
http://www.ebay.es/sch/itechnical/m.html?item=160593246962&sspagename=STRK%3AMEWNX%3AIT&rt=nc&_trksid=p3984.m1497.l2649&_trksid=p4340.l2562
http://www.ebay.es/itm/126-Animation-Video-Loops-Motion-Background-Abstract-/160593246971?pt=UK_Computing_Software_Software_SR&hash=item25641a7afb
y tambien
http://www.pond5.com/stock-video-footage/1/studio-loop-background.html
Un saludo
http://www.ebay.es/sch/itechnical/m.html?item=160593246962&sspagename=STRK%3AMEWNX%3AIT&rt=nc&_trksid=p3984.m1497.l2649&_trksid=p4340.l2562
http://www.ebay.es/itm/126-Animation-Video-Loops-Motion-Background-Abstract-/160593246971?pt=UK_Computing_Software_Software_SR&hash=item25641a7afb
y tambien
http://www.pond5.com/stock-video-footage/1/studio-loop-background.html
Un saludo