Buy or rent a movie digitally, then use free software like to compress it to 300MB yourself. This is legal (personal use) and gives you clean, malware-free files.
A 300MB movie is unwatchable on anything larger than a phone screen. even on a 6-inch display: World4ufree-9xmovies-300mb-movies
Let me know, and I can try to suggest some officially available streaming options or free resources! Buy or rent a movie digitally, then use
Shrinking a 2GB HD file into a 300MB-400MB file while attempting to maintain watchable quality. Buy or rent a movie digitally