I like: First Orbit film
The footage and sound of cosmonaut Yuri Gagarin’s preparation and first flight, and hearing the 50-year old recordings of his voice are something that I find amazing.
Whilst monkeys and dogs had made it into space there was still a high risk of a horrible death out in the vacuum of space. Yet Gargarin stepped forward into the void. The in-orbit footage was a recreation of the view from Gargarin’s flight path taken from the International Space Station.