Yes, YouTube hosts thousands of full Bollywood and Hollywood movies. Search for "Shemaroo Movies" or "Cinewave Hindi." You can download them legally via YouTube Premium (which costs ~$2/month) in 480p. File sizes are naturally small via the official app.
: Many older or independent films are available for free (with ads) on official channels, and you can adjust the playback quality to 360p or 480p to save data. Hotstar / JioCinema
