Interesting resource. A blog of medical videos. Some live, some animated.
They didn't work for me using Safari, but did with Firefox, so be warned.
The one I watched (the cardiac cycle) was not great, but might have a useful bit in it. I'm most interested in the site because it is actively updated, meaning more videos are added. Something to keep an eye on.
It also suggests to me that there might be other such sites out there.