You can not “overwrite” the title using the filename. You can however use embedded metadata to overwrite the title.
On Windows, you can right-click the file, select properties, goto details tab, then type in what you want for the title field.
It will only work with MP4/M4V files and you have to have LMA enabled.
https://support.plex.tv/articles/200220677-local-media-assets-movies/
You will have to refresh metadata after you add the MP4 title information.
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