In India, the movie is frequently rotated on Amazon Prime Video’s catalog under the "Tips" collection. If you have a Prime subscription, you can watch it ad-free. Availability varies by country (US/UK users may need a VPN).
As for streaming or downloading the movie, I would recommend checking out legitimate and legal websites that offer Indian films. Here are a few options: ramaiya vastavaiya movie veoh website
Veoh still exists, but it has pivoted away from its "free-for-all" user-uploaded library due to copyright laws. Most of the full Bollywood movies that used to live on Veoh have been taken down or moved to verified, ad-supported platforms. In India, the movie is frequently rotated on