"Welcome 2 Karachi — Filmyzilla" appears to be a bootleg/unauthorized release seeded on piracy sites. As such, the viewing experience is hindered by legal and quality issues that undermine any artistic merit the film might have.
The Indian government and industry bodies are actively fighting this problem. They have set up specialized anti-piracy units and successfully shut down many domains. However, the "domain hopping" strategy of these pirate sites makes it a constant game of whack-a-mole, where new sites appear almost as quickly as old ones are taken down. welcome 2 karachi filmyzilla