It turns out there is an easy way to find out how many films you have on your Plex server
In /var/lib/plexmediaserver/Library/Application Support/Plex Media Server/Plug-in Support/Databases
echo "SELECT library_sections.name AS Libary, metadata_series.title as Series, metadata_season.'index' AS Season, metadata_media.title AS Title FROM media_items
INNER JOIN metadata_items as metadata_media
ON media_items.metadata_item_id = metadata_media.id
LEFT JOIN metadata_items as metadata_season
ON metadata_media.parent_id = metadata_season.id
LEFT JOIN metadata_items as metadata_series
ON metadata_season.parent_id = metadata_series.id
INNER JOIN section_locations
ON media_items.section_location_id = section_locations.id
INNER JOIN library_sections
ON library_sections.id = section_locations.library_section_id" | sqlite3 com.plexapp.plugins.library.db | grep Films | wc