Because downloading copyrighted material is illegal, internet service providers (ISPs) and governments frequently block domains like Isaimini.
However, there is a major catch. These sites operate in a legal gray zone. Domain registrars frequently shut them down. So, while one URL (e.g., Isaimini.com) might be blocked by your ISP, another (Isaimini.pro) pops up. Searching for "Isaimini Tharai Thappattai work" often yields results from these ever-changing proxy sites.