I consider only feature films (from 60 minutes).
Unfortunately many best films of the USSR aren’t present in base.
Names of these films:
20. The Stationmaster (1925, Ivan Moskvin, Yuri Zhelyabuzhsky)
21. The Case of the Three Million (1926, Yakov Protazanov)
22. The Forty-first (1927, Yakov Protazanov)
23. The Living Corpse (1928, Fyodor Otsep)
24. The house on Trumpet (1928, Boris Barnet)
25. The my Grandmother (1929, Kote Miqaberidze)