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!