This is an excellent free PBS video about what the universe is composed of in terms of matter, dark matter, energy, and dark energy. The video spends roughly half the time detailing the discovery and continuing study of dark matter and then the other half doing the same with dark energy. The big bang, current astrophysics work, and the future of the universe are all covered in the video. This is a worksheet containing questions that can be answered by the students while watching the video to ensure they are paying attention.
The video can be streamed for free off the PBS website here: