Nautilus and file comannd in 11.04 don't show metadata for WebM files

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http://askubuntu.com – The file-name extension: ".webm" is used for media files in a certain audio-video format called WebM, which has different qualities. For the files in that format, the program "file" says that files are rough data, instead of determining and displaying the real file-type, which is WebM plus the quality. Besides, Nautilus doesn't display the different qualities within this format). I think that is another thing that should be corrected asap. Because the image that Linux is giving is deteriorating. Why is the 'file' program not displaying the file format for WebM files? Is that correct? Is that (HowTos)