Display dimensions of mpg video files in explorer?

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If I enable the "Dimensions" column in explorer's details view, it will
show the dimensions of *.avi video files, but not of *.mpg video files.
Is there any way to get it to do so?

Also, I noticed that there is an "Episode Name" column available in the
details view. How do you add that info to a file, other than in the
file name itself?

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