WebM video player with audio support (C++)

Some time ago I was looking for a simple video player library  written in C++, that would be free, multi-threaded, supporting audio and it would not be Ogg Theora :). I could not find anything useful. There is Bink, which is great, but paid (and expensive). Codecs like h.264 have not very friendly licenses or come with various restrictions (openh264). […]