If you are using the global folder method, you won’t see the icon. The videos will only show under the Artsit page as an extra or video. I’m pretty sure it’s designed that way. I didn’t want the icon so I decided on the global folder method.
I would re-scan the music library, and then empty trash, clean bundles, etc. You probably need to do the complete Plex Dance, not just selected steps, to remove the duplicates.