An interesting educational film from the late 60s.
And Gemini was an interesting craft. It flew before Apollo but was conceived after, and in some ways was more advanced than Apollo. For example, it was designed with the input of the astronauts, and for that reason the controls and interior ended up being similar to the aircraft they were used to flying.
There was even a plan to fly the capsule in from orbit.
Gemini was intended to be a step beyond capsules like Mercury and be a bridge to the assumed inevitable future of spaceplanes. This is a future that has not yet been persued.