Just noticed another problem: A "Transparent" copy of the Document means a machine-readable copy, represented in a format ... that is suitable for input to text formatters or for automatic translation to a variety of formats suitable for input to text formatters. ... A copy that is not "Transparent" is called "Opaque".
Notice that a sound file, movie, etc., in any form, is not suitable for input to text formatters. It thus can't be a transparent format. I apparently can't make a training video from the EMACS manual; remember, my video is a "modified version" of the EMACS manual, and thus I am obliged to provide a transparent version which, under the definition above, I can't do.
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