My purpose here is to create a list of movies that would help to give a gist of some Indian history. I do not recommend that you rely on these movies for absolute accuracy, though some are better than others. (Gandhi for instance, is much more closely documented than Ashoka the Great, which is a song and dance extravaganza that loosely relates to the life of the subject).
I do believe that these movies are useful for introductory purposes. Before accepting anything in these sorts of movies as fact, I recommend doing some background checking. But these movies might motivate you (as over the years they have motivated me) to care enough to do some serious research and reading.