My newly installed gloobus won' t load video or audio files. It can load mp4 video but only outputs the audio, it won' t show any image from the video file. It used to work fine on a previews install of 12.04 on the same machine. It can still preview images though.
SOLVED! I just had to let movie player download codecs to support video and audio formats when trying to open those videos with movie player. or via terminal run this command