I think this is to do with the legal status of libdvdcss and libaacs, upon which VideoLAN relies.
Even though these modules are open, the legal situation for them in the US is unclear - this affects the open nature of the package from the point of view of Fedora. The distribution is wholly devoted to -only- open source software, and just being released under the GPL isn't enough - it also has to be unfettered by patent and other licensing issues.
Until this situation is clarified, then VLC will probably remain in the RPMFusion repositories, and not be a part of the official releases.
There is a little of the legal information here: https://www.videolan.org/legal.html