Ranbir Kapoor's lack of social media knowledge has got director Imtiaz Ali worried, who joked that he is now pinning hopes on his leading lady Deepika Padukone for the publicity of their upcoming film 'Tamasha'.

This sequence forms the part of an over two-minute video clip, where Imtiaz and Ranbir are involved in a playful, friendly banter over the actor's absence from social networking sites.