mime type or content type of that video is actually
'application/x-shockwave-flash'
which is not supported by VLC , supported by Flash player ( and Quick
Time ).when you see video on metacafe or youtube those video files are actually
'application/x-shockwave-flash' handled by flash player
but when you download them using any extension , it is usually saved as
.FLV which can be played by VLC.