For M4V Converter, How to work well on iTunes 12.2
Step-by-step guide to set preferences of iTunes 12.2 or later
Kigo M4V Converter needs to read iTunes Library information through the file "iTunes Library.xml". For iTunes 12.2 users, you need to allow iTunes to share the XML file:
STEP 1. Launch iTunes to set the Preferences
Choose Preferences. Then click Advanced and check on the box beside "Share iTunes Library XML with other applications".
STEP 2. Quit your iTunes.
STEP 3. Now run your M4V Converter and take a try.
If still you can't find any M4V video in converter, please drag the M4V files to the M4V converter directly from your file folder.
About the iTunes Library.xml file
This file contains some (but not all) of the same information stored in the iTunes Library file. The purpose of the iTunes Library.xml file is to make your music and playlists available to other applications on your computer.