Indian/Pakistani music videos routinely have several hundred million or a billion+ views. Many of the largest YouTube channels are Indian record labels. So yes, people are listening to them, but using that to create some larger narrative of "unity" or whatever else is weird.
It's also important to understand that less than half of India speaks hindi/urdu as a native language, and less than a 10th of the country speaks/understands punjabi (which this song is in). There are more speakers of Punjabi in Pakistan than there are in India.