I'm glad the frame parser works. I might add it as a feature to the upcoming version.
The problem is, that the logic does not work as you described. If a post is neither categorized as Video or Book, it will still be displayed, it does not restric only to the visible categories.
If you want to restrict the results excplicitly to items from only the Videos and Books category, then on the Advanced Options -> Exclude results panel scroll to the:
Include posts (or cpt, attachments, comments) only from selected categories/taxonomy terms
..option, and select those two categories only.
This way the final sub-set of results is fully restricted to these two categories, and nothing else.Best,
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