Digitized travelogues and children's magazines like Tamasha Two To help you find exactly what you're looking for, should I: Search for specific video performances from the 1950s-70s?
You can find documentation like the "Tamasha: Folk Theatre of Maharashtra" video, which captures performances and cultural discussions from as early as 1990. tamasha internet archive
Here’s an honest breakdown of what you’ll find there. tamasha internet archive