How to tag any file on the Unix system?

I am trying to figure out the best solution to tag files in GNU/Linux. This is the particular thing I am trying to achieve. I download all my movies and save them on the external SSD. I sort them in two directories: "watched" and "to_watch". However, I want to assign attributes to each movie such as (but not limited to): main actor(s), director(s), genre. That way, if I have a huge amount of files and I am in a mood to watch a movie directed by Scorsese, I can display only movies that contain a tag "scorsese". Here are some of the requirements that I have: - I want the solution to be independent of my local computer being used. For example, if I take my external SSD to my friend who also has the Unix system (and installs the required solution for tags), he's computer will also be able to interpret all of the tags generated by me. - I want to have a CLI option. - If I change the file's location, the tag(s) still stays with the file. - I can assign multiple tags to the file. - I can tag a file of any format. - I can tag a directory as well (not only files).