I don't prefer using this feature to collect my TV show videos in powerdvd's TV library.
There are some restrictions on the filename and folder names if you want to import videos into TV library and let the library group the videos semi-automatically.
To make it simple, I would just put my TV videos per folders in the Windows explorer, and import the vidoes into powerdvd's Video library instead.
If you would really like to use this feature, for the filename and folder names rules, perhaps you can refer to the help file:
https://help.cyberlink.com/stat/help/powerdvd/20/pc-mode/enu/12_02_02_tv_shows.htm