If you already have the video file, you can look for a separate (subtitle) file. Reliable Sites : Check OpenSubtitles or Subscene.
. Prabhu's world is turned upside down when his bike is stolen and used by a drug-running gang, forcing him into a violent confrontation with the underworld. Where to Watch with Subtitles: Polladhavan English Subtitles
Generally the most reliable official source for the Tamil version with English subtitles. Often carries the Telugu-dubbed version (titled ) with English subtitles. Many uploads exist but often lack subtitles If you already have the video file, you