From Mercury to Apollo, Part 3 | A.Nikitin

The beginning of the Soviet manned space program. The Vostok program to put the first Soviet cosmonauts into low Earth orbit and return them safely. The Soviet space dog missions as a preparatory stage before human missions. A brief overview of all six Vostok missions with humans on board.
Source: https://www.youtube.com/watch?v=2ZNadG8N-NI