Sony Pictures has released Saawariya on YouTube. While you may have to "rent" or "buy" it in some regions, it is frequently rotated into the Free with Ads section. Searching "Saawariya full movie Sony" is safer than any index.
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Keep an eye on Sony Max or SET India. Bhansali films are TV staples during festive seasons. Recording it via DVR is legal for personal use; downloading via index is not. Sony Pictures has released Saawariya on YouTube