I’m not sure what you mean by “piece together an expansive and outstanding reference.” Do you want:
For international viewers, offers classic Indian cinema for free with a library card. Archive.org hosts public domain Indian films that are copyright-free (typically those over 60 years old with expired rights). mkvcinemas old hindi movie
Iconic titles like Shree 420 (1955) and Sangam (1964) defined this period with social themes and timeless melodies. I’m not sure what you mean by “piece