https://www.dotnetzone.gr:443/cs/blogs/birbilis/archive/2014/12/12/gotcha-mediaelement-source-null-releases-stream-setsource-null-fails.aspxThis is my contribution to: http://stackoverflow.com/questions/19294258/forcing-mediaelement-to-release-stream-after-playback/27436323 If you use MediaElement, make sure you don’t get bitten by this one: http://msdn.microsoft.com/en-us/library/cc626563(v=vs.95).aspxelCommunityServer 2.1 SP3 (Build: 20423.1)