Raj Khatri, Creative head at Ma+Th Entertainment network pvt ltd, in conversation with mid-day.com's 'BTS Stars' shares all you ever wanted to know about film posters. What is the story behind Vidya Balan's Kahaani poster or Katrina Kaif and Vijay Sethupati's Merry Christmas? What went into Shahid Kapoor's Farzi? Get all the answers in our latest episode!