GMediaServer is described as 'serves audio and video files to certain network connected media players. Most hardware media players only play music and/or video—they don't provide the media themselves. Those media files have to come from a device on the network' and is an app in the Video & Movies category. There are eight alternatives to GMediaServer for a variety of platforms, including Linux, Windows, Self-Hosted solutions, Mac and Android. The best alternative is YouPHPTube, which is both free and Open Source. Other great apps like GMediaServer are Ushare uPnP media server (Free, Open Source), Octopus (Free, Open Source), Red5 (Freemium) and Wowza Media Server (Paid).
uShare is a UPnP (TM) A/V & DLNA Media Server. It implements the server component that provides UPnP media devices with information on available multimedia files. uShare uses the built-in http server of libupnp to stream the files to clients.
The open source video transcoding and delivering platform based on Drupal. This will provide you ability to quickly set up a video platform like Youtube using self hosted Ffmpge or using Zencoder video transcoder.
Kurento Media Server provides, out of the box, group communications, mixing, transcoding, recording and playing. In addition, it also provides advanced modules for media processing including computer vision, augmented reality, alpha blending and much more.
Flumotion is a leader in online video and audio technology. The multiple award-winning services include an Online Video Platform and Online Radio Platform that maximize content monetization and return on investment.