For those of you seeking (ha!) a solution for progressive video seeking, you’ll definitely want to take a look at the xMoov Server (formerly xMoov-PHP). It’s a free, open-source solution for accessing parts of your video that haven’t yet been downloaded — mimicking the seeking behavior of streaming (alá YouTube). It ships with a prebuilt audio and video players so you can get started right away (but of course

It supports Flash, Quicktime X, and Apple iPhone delivery, and can deliver virtually any type of file, not just video. It is released under a non-commercial license, so if you have ads on your site or want to use this for a client project you’ll need to buy a license. But at $50 for a single server, it’s very reasonable.