Shah Rukh Khan’s voice is dubbed by playback singer (known for his work in Pakistani pop music), whose raw, edgy, and slightly husky vocals add a layer of vulnerability and urgency. The result is a song that feels less like a performance and more like a frantic, inner confession.
The most likely interpretation is a of the 2012 Bollywood film Jab Tak Hai Jaan (directed by Yash Chopra, starring Shah Rukh Khan, Katrina Kaif, Anushka Sharma). Index Jab Tak Hai Jaan