Services like Google Play Movies, iTunes, and YouTube Movies often have movies available for purchase or rent, potentially including dubbed versions.
: Accessing pirated content is illegal in many regions and does not support the creators who made the film. Disney+ Hotstar --- Pirates Of The Caribbean 4 Tamil Dubbed Kuttymovies
: You can find various clips and often the full movie for rent or purchase with Tamil audio options. Apple iTunes / Google Play Services like Google Play Movies, iTunes, and YouTube