Use HandBrake to encode Hindi movies in H.265 (HEVC) at 360p. You’ll get better quality than 3GP at roughly the same file size.
Here is a blog post exploring the era of 3GP Hindi movies and why they were a game-changer. 3gp Mobile Video Hindi Movies
Today, as you stream Jawan or Pathaan in 4K Dolby Vision on a 6.7-inch AMOLED screen, take a moment to appreciate the humble 3GP file. It was the original portable cinema for a billion aspirations. Use HandBrake to encode Hindi movies in H
Because studios like Yash Raj Films and Dharma Productions did not release official 3GP versions (the concept of mobile-first content was embryonic), piracy filled a massive demand vacuum. This era created a generation that normalized "consumption without payment" for mobile video. 3gp Mobile Video Hindi Movies