I'm currently unable to find the rule we once made for playlists but putting all items of one channel in one folder (and one folder for each video in there) would be possible like this:
1. Go to Settings -> Plugins -> YT -> Scroll down and put the following in "Customized Packagename":
Code:
USERNAME - *USERNAME* - TITLE - *VIDEONAME*
2. Go to Settings -> Packagizer -> Add this rule (customize downloadpath):
-psp-