Why don't use VLC Portable ? Since you guys don't provide portability people are forced to do it. How could they run the player from usb device on other computer and not mess with it's settings. Second. Portability is not only about usb. Many people have small system partition and put all programs/data outside of system directories so if something is wrong one can easily ghost back his system from backup and not bother with tiny files in who-knows-where deep system directories and registry. But sadly all systems win/mac/linux are forcing people to use their idea where data and programs should be put and have separate places for those. It's ok in formalized work environment where many people have access to one computer and programs are big in resources so it is not sane to copy them for every user. But that's old idea when computers were expensive and storage space scarse. Now everyone can have his own computer(s!!!) with terabytes of space. I mean own so no other people are allowed to log or work and on such case idea of user accounts and separate storage for programs and data is counterproductive.
Such systems should be modular like bricks, like pieces of code in OOP. If I install (in that case this is meaningless concept, install means just extract and copy to place of your liking) a program there should be no other resources affected so when program uninstalls (also meaningless, user just deletes the folder and that's it) there is no need to remember what was changed when it was installed.
But if you guys are hostile to the idea (
https://trac.videolan.org/vlc/ticket/8698 ) I and many people have no other option.