Hi,
We don’t have anything in Custom Post Type UI or CPTUI Extended that integrates with the media library like that, so while I have to believe it’s potentially possible, it’s probably not going to be a simple thing to do, as you’ve already experienced.
Without knowing what code you’ve tried thus far, I don’t really have anything I can suggest on why it may or may not be failing. Definitely not something I’ve tried on my own either, admittedly.
Michael, thank you for your quick reply!
Some of the solutions I have tried are on this post. I implemented without success Sabari’s and Benedikt’s:
https://stackoverflow.com/questions/20401351/how-to-the-get-the-wordpress-media-search-to-include-tags
I didn’t want to install more plugins, but this one offers a filter option:
F4 Media Taxonomies
Definitely a lot of complex code going on with a lot of MySQL modifications.
That said, if F4 Media Taxonomies works and offers search capabilities of the media library items, then it may be the best route to go with, even if it is an extra plugin. Biggest thing is that CPTUI doesn’t add the search ability for the media library and taxonomy terms, so additional tools are needed.