If you aren't ready to pay, these players are and open-source: IINA: The most "Mac-like" player; modern, fast, and free.
Automatically fetches movie posters and descriptions for your library. ⚠️ A Note on "Free" Downloads Playr 2 for Mac Free Download
Plays almost any file type (MKV, MP4, AVI, etc.) without extra codecs. If you aren't ready to pay, these players
The classic choice that plays literally everything. If you aren't ready to pay
