OpenH264 is not the "best" encoder ever made, but it is arguably the most important for the open web. It solved the patent deadlock that stalled HTML5 video adoption. For any project requiring real-time communication or embedded video support without legal liability, OpenH264 remains the gold standard.
However, there is no widely known research paper or project named "Eternity OpenH264" in standard academic or engineering databases. eternity openh264