There are certain movies where IMDB does not return any data when queried by Plex.
Some may be due to licensing. Plex does not scrape data from IMDB. Plex licenses (pays for) IMDB data for theatrical release movies only. So, items such as TV movies or direct to video releases may appear in IMDB, but Plex is not licensed to have that information.
The Plex Dance.
The Plex Dance removes media from your library and all pertinent information from the database. It is as if you never added the media to your system.
It is useful when you have edited/modified a file, replaced a movie with a new version, etc.
It will not help with the IMDB metadata issue.
You lose all information such as watched/unwatched, when watched, how many times played and by whom (i.e. play count), etc if you Plex Dance a movie/show.
If you change metadata providers (IMDB to Rotten Tomatoes, etc), ratings from the new provider will only be shown for media added after the change. Existing ratings will not be changed.
Refreshing the metadata for an entire library will download information from the new provider for all media in the library.
