Instead of using high-risk piracy sites, you can find The Hangover trilogy on several official streaming platforms in India. These services offer the original high-definition version, though the availability of the official Tamil dub may vary by platform.
Title: The Digital Frontier of Regional Localization: A Study of "The Hangover" Tamil Dubbing and the Tamilrockers Phenomenon 1. Introduction The 2009 American comedy The Hangover Hangover Tamil Dubbed Tamilrockers