I had discovered the online Russian digital film/newsreel archive Net-Film back in 2013 when I posted about discovering rare video of the dancers Tara Chaudhri, Guru Gopinath, and Indrani Rahman at the site. Net-Film seems to have since expanded its collection beyond just Russia's Central Studio of Documentary Films, the "oldest and largest film studio in the former Soviet Union," to also include many other studios equaling storage of "about 50,000 films" that are being regularly digitized. Since Net-Film is aimed at providing paid licensing for its content, all the video clips are small, full-length "previews" which have the running timestamp prominently and annoyingly displayed at the bottom to aid requests for exact footage segments. Net-Film also seems to have updated the backend technology and usability of the site and it is no longer glitchy.
The Morning in India (1956, Russian)
This documentary film "about the history of India, struggle for independence, and present of the country" has the rare finds in reels 6 and 7 which focus on Tamil Nadu and West Bengal.