A middle-aged man rises from coils of celluloid, while Ilaiyaraaja sings ‘Kadha Kelu’ and urges the audience to listen to “a delightful, entertaining story.” The man, the forever-young Singeetham Srinivasa Rao, allows a group of children to look through his bioscope and watch the genre-defining story take shape. This is how the audience is taken…