IMDb link: https://www.imdb.com/title/tt4200818
https://www.imcdb.org/movie_1004513433-Pereval.html

One of the flags is similar to the Russian one, so we can use Russia for that I suppose.

Origin: USSR

https://www.imcdb.org/movie_428207-Edinstvennoe-voskresennye.html
Original cyrillic title Единственное воскресенье
Estonian title Ainus pühapäev

Origin: Russia
https://www.imcdb.org/movie_483200-Vedma.html

Origin: Russian Empire(Looks like we dont have this flag? List as Russian? Or just keep it as it is?)

https://www.imcdb.org/movie_14219114-Laenatud-naene.html

Origin: Finland

https://www.imcdb.org/movie_467756-Aika-tappaa.html

Origin: Estonia

https://www.imcdb.org/movie_2120166-T%C3%A4itsa-l%C3%B5pp.html
https://www.imcdb.org/movie_6315438-Seltsimees-laps.html
https://www.imcdb.org/movie_1749505-ENSV--Eesti-N%C3%B5ukogude-Sotsialistlik-Vabariik.html
https://www.imcdb.org/movie_245243-Ma-olen-v%C3%A4sinud-vihkamast.html
https://www.imcdb.org/movie_969685-Wremja.html
https://www.imcdb.org/movie_439664-Lammas-all-paremas-nurgas.html
https://www.imcdb.org/movie_5604510-P%C3%A4evad%2C-mis-ajasid-segadusse.html
https://www.imcdb.org/movie_1004517218-Wigla-Show.html
https://www.imcdb.org/movie_816423-August-1991.html

Origin: Israel and end year = 9999 (still in production):

https://www.imcdb.org/movie.php?id=4565380

Origin: UK

https://www.imcdb.org/movie_93044-The-Fourth-Protocol.html

Origin: USA

https://www.imcdb.org/movie_113347-How-to-Make-an-American-Quilt.html

Origin: Australia

https://www.imcdb.org/movie_4982252-Lone-Wolves.html
https://www.imcdb.org/movie_1004526738-Rolling-Blackouts-Coastal-Fever--An-Air-Conditioned-Man.html

Origin: USA

https://www.imcdb.org/movie_57889-Black-Like-Me.html
https://www.imcdb.org/movie_102603-Oscar.html

Origin: UK

https://www.imcdb.org/movie_10826712-Keane--Somewhere-Only-We-Know.html

It seems so, sorry, I'll check that now.

edit: new link for Spider Man series: https://www.imcdb.org/movie.php?id=76975

@antp?? did you miss my comment above?