You don’t, because that’s against the rules. You buy the films and then use the copies you purchased.
MakeMKV is a good free tool for ripping Blu-Ray discs without reencoding/losing quality, and tsmuxer is a good tool for taking that MKV and splitting the video and audio streams into their own files so you can import them into your video editor of choice (most of which don’t like working with MKV files).