Decrypt .m3u8 and .ts Files

I need assistance to decrypting files with .m3u8 and .ts extensions. The files currently run only on a third-party application, and I want to extract the media content for use on a desktop application.

Ideal Skills:
- Experience with file decryption
- Familiarity with .m3u8 and .ts file formats
- Knowledge of Mac applications

Please note, I need help with decrypting both types of files.