From Fedora Project Wiki
Why can I not download the RPM
There is a very small subset of rpms that exist that due to various legal reasons we can not distribute, even though we can build them inside of fedora. At the time of writing this the example is the openh264 codec. Cisco has paid for a patent grant for people to use the h.264 codec, however one of the terms of the patent grant is that Cisco has to distribute the binaries. Fedora has worked with Cisco to have us build and sign the rpms, then ship them a repo that they can publish and we can reference in a disabled repo that end users will be able to enable to legally get the codec while being able to verify the bit integrity of it and have packages that integrate nicely into a fedora system.