This video on the formation of the solar system would be great for a recap or intro to a lesson on our solar system.
This video is about the different types of clouds and the weather patterns associated with them. This would be good for a video break between the intro to the class and lecture time.
I think this video can be used to have a discussion on Alaska weather and changing weather patterns from this last fall/winter.
This is a visually stimulating look at volcano formation and their destructive capabilities, that would be great for an intro to volcanoes or igneous activity.
This is a short informational video on earthquakes and how they work that would be perfect for an after lecture break before entering into the lab or working on assignments..