Where I can find old training of PTC university

Hi Ben, there is no similar content on Youtube!

I would like to access the old Text Training for Windchill in enterprise.ptcu.com such as Windchill for heavy users or Windchill for system administrators, etc. as I used to to refer to them to create my own training.

I'm really disappointed, how could such highly valuable content be archived or deleted instead of migrated to another platform, I was planning to copy some courses, but didn't find time to take all what I need!