Feature Request: Export local video DB library to a file, import into new Plex installation

Well… as cumbersome as it might be. The direct way is while staying on the same type of platform is to follow this support article:
https://support.plex.tv/articles/201370363-move-an-install-to-another-system/

As for a migration wizard / GUI supported migration… there used to be a feature suggestion but very little interest over the years (mostly because people simply don’t migrate their servers every other day).