If you are looking for high-quality rips (for personal archival from legal sources), these films are common in MKV format due to their cinematography and audio:
Since your request was a bit open-ended, I’ve put together a short "paper" (think of it as a brief overview or a concept note) about the landscape of Marathi movies, which you can use as a starting point for a blog post, a review, or a study. mkv marathi movies