This indicates the video quality. A "remux" is a lossless rip of a Blu-ray or 4K UHD disc where the original video and audio data are moved into a new file container (like MKV) without being compressed or re-encoded. This results in the highest possible digital quality but very large file sizes, often between 20GB and 90GB.
This likely refers to the "release group" or the specific individual/team that created and uploaded this particular version of the file. lafamiliaaddams22021remuxg36.part04.rar
Because remux files are so large, they are often split into smaller "parts" for easier downloading or sharing. You would need all the parts (part01, part02, etc.) to successfully extract and watch the full movie. This indicates the video quality
This identifies the content as the sequel to the 2019 animated film, The Addams Family 2 , released in 2021. This likely refers to the "release group" or