OpenTK does not support video playback which is a common request for multimedia applications. This is a initial test of Gstreamer-sharp working with OpenTK. Reference: http://www.opentk.com/ http://cgit.freedesktop.org/gstreamer/gstreamer-sharp/ If you encounter this bug: http://lists.freedesktop.org/archives/gstreamer-bugs/2010-August/068387.html Download latest source and compile. Replace /usr/lib/cli/gstreamer-sharp-0.9/gstreamer-sharp.dll. (#edit): Add ThreadedGLSLVideoPlayer.cs. Improve performace significantly with GPU color conversion.