If you are looking for the original film or high-quality versions, you can find it on major streaming platforms: : Available to watch on Peacock.

"The 2004 original was just a story," a voice whispered from his own speakers, perfectly synced with her lips. "The Exclusive is an invitation."

: This is likely a technical label used by the uploader on the site. It often indicates a "draft" or unofficial Tamil dubbing—sometimes a preliminary version or a fan-made voiceover—rather than a professional studio-produced dub. How to Watch Decoys (2004) Legally

As for "Isaidub Exclusive", it seems to be a reference to a torrent or a download link for the movie "Decoys" being shared on a platform, likely a piracy website or forum. "Isaidub" might be a username or a handle associated with sharing or uploading copyrighted content.

(2004) is a Canadian sci-fi horror film blending teenage comedy with a "species" premise, featuring alien creatures using seduction to reproduce

To understand you have to understand the source. Iaidub is a notorious piracy website primarily serving the Tamil film industry (Kollywood). However, like most major piracy rings, it has expanded into a massive repository of Hollywood, Bollywood, and even obscure international films.