Features several "Vidiyal" related tracks and curated playlists that include spiritual and uplifting Tamil melodies. Apple Music: Vidiyal (Original Soundtrack) - Single

The song requires a voice that conveys (devotion) rather than just technical perfection.

Most of the apps listed above (Spotify, Gaana, JioSaavn) allow you to download the song for offline listening within their app if you have a premium subscription. This is the safest and legal way to "download" the song to your phone.