If you are looking to set up a way to download movies in a highly compressed format (like 300MB mkv movies

• Use HTTPS (SSL/TLS) to encrypt data in transit.
• Implement user authentication and authorization.

To create the actual "download" experience, you must link to files: Internet Archive

Using high-efficiency audio formats like AAC at lower bitrates to save additional space. Safety and Security Risks

• Telegram channels dedicated to piracy.
• Reddit communities (often banned or quarantined).
• Proxy sites that mirror the original content.