At PlusNet we've made a bunch of long videos (around 20mins each!) and it would really help to be able to place bookmarks within those videos so people can quickly jump to sections that interest them. I've just had a brief look at the common video sharing websites (Vimeo, YouTube, DailyMotion, Google Video and Flickr's new offering, but haven't found any that support it. This would be really useful! Any one know any that support it?