My dad is a huge sci-fi buff, so he gets pretty amped seeing the trailers with a lot of pew-pew and stuff blowing up. He actually started playing it and I'm teaching him the ropes (at least it's giving him a break from watching Star Trek reruns). But another family member is an astrophysicist and really isn't into sci-fi much. Frontier makes some awesome trailers, but nothing that really focuses on exploration. What are good videos I can find on YouTube, that show off the exploration side, and would appeal to the astronomers I know?