In the Area of Special Attention (Full HD, action film, directed by Andrey Malyukov, 1977)

Three reconnaissance teams are dropped behind mock enemy lines on a Soviet paratrooper exercise with two days to find a hidden command post. Andrey Malyukov's training-ground thriller is really about a hard veteran and a young lieutenant working out what the other is worth.

Why it's free: Free on Mosfilm's own channel; Mosfilm holds the rights to the Soviet-era library it publishes.