To fit a movie into such a small file size, uploaders use advanced video codecs like or x264 .
The "300MB" format refers to highly compressed versions of full-length films, typically encoded in formats like or MP4 . Historically, this size was optimized for mobile users in India with limited data plans or slow internet speeds, allowing them to download a 2-to-3-hour Bollywood blockbuster without exhausting their daily data quota. The Technical Magic: How They Fit 300mb movies bollywood