Here’s a post you can use, keeping in mind that “Okjattin” and similar sites are known for pirating movies, which is illegal and harms the film industry. I’ve written this as a cautionary/informational post rather than promoting piracy.

How to access OK Jattin Movie legally

Compression: Re-encoding the video to a smaller file size while attempting to maintain high visual quality (often using codecs like x264 or x265). Origins and Naming

Size Optimization: Repacks often significantly reduce the original file size, making them easier to download on slower connections.