Going along with the last articles theme of hypergolic fuels, with a focus on the Gemini spacecraft, we have this 1964 film, from the very early days of Gemini, explaining the propulsion systems and operation of the maneuviring capabilities of the Gemini. Gemini was the first manned spacecraft capable of making major orbital trajectory changes, and through such, allowed us to practice the critical tasks of rendezvous and docking, without which a mission to the moon as planned would have been impossible.
This is a shorter film, but it goes into some good detail on the nature of the Gemini propulsion system. It’s certainly worth the watch if you enjoyed the previous film.