Omnivorous Surfer

It includes hundreds of sources categorized by discipline as well as some links for searching. Sites provide FREE videos, though some may also include videos available for a fee.

If you haven't found LiveBinders yet, you might find it useful as well. It's a great way to organize links and to make them available to others. The fact that most (unless the site must be viewed in its own window) will display right on the LiveBinders page can be a benefit in some circumstances as well. It's FREE to use if you wish to create your own binder (public or private), and a search can bring up some great binders which have been created by others.