Newly added movies don't appear in Plex

Plex Media Server Desktops & Laptops
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Some things to try:

  1. Sort the library by date added, so the most recently added movies appear first. That can help if the movie is being incorrectly recognized and added under a different name.

  2. The file is an MP4. If Plex is configured to use local metadata and that metadata is incorrect, it can throw off Plex’s ability to correctly match movies.

    Use Subler to verify and, if needed, modify any embedded metadata.

    Unless needed, disable reading of embedded metadata.
    If using the Plex Movie agent/scanner:
    Edit the library
    Choose Advanced
    Deselect Prefer local metadata
    Save Changes & refresh the library metadata.

  3. Add the TMDB ID to the file name.
    Then Plex Dance the movie.
    A Matter of Life and Death (1946) {tmdb-28162}.mp4