Add new CN format for MPEG-2 or update video/mpeg format to cover MPEG-2
We already have this format:
<objectFormat> <formatId>video/mpeg</formatId> <formatName>MPEG-1 Video</formatName> <formatType>DATA</formatType> <mediaType name="video/mpeg"/> <extension>mpg</extension> </objectFormat>
It clearly says MPEG-1 Video but there is also an MPEG-2 format. It'd be useful to have a proper format ID to use for MPEG-2 video. The info for MPEG-2 is largely the same as for MPEG-1 (format type, mediaType, extension). Should we add a new format or just update the description of the existing one? We also have an MP4 format type so maybe that'd be a reason to just add another to cover MPEG-2.