This was filmed recently by Expedition 18 Commander Mike Fincke.
He talks you around the inside of every module within the ISS and introduces all the various instruments.
In the background you get to see his two colleagues taking their daily excercise.
Great to watch. Gives a detailed insight into what life on the station is really like. There are a couple of shots of Earth out the window too.
Click the links to watch: Part 1 - Part 2 - Part 3 - Part 4
Be sure to click the "watch in high-definition" links if your connection speed can handle it.