Videos are a great resource when teaching space. Of course, we all know that Bill Nye has quite a few videos on Astronomy, as does NOVA, and the documentaries The Universe and Through the Wormhole. All great videos, but Americans may not have seen the following great videos related to space since they're from Canada and the UK.
Top Gear has covered NASA's newest rover:
This one is great, especially if you have students who are fans of the British show.
Chris Hadfield is responsible for the rest of my favorite videos. The Canadian astronaut and all around amazing guy is responsible for these gems you and your students will love :)
How do you sleep in space?
Can you cry in space?
Wet washcloth in space - the kids loved this one so much!
And some of his music recorded in the ISS:
And ISS - Is Somebody Singing