Hi Dale,
Thank you for submitting your ideas!
Regarding the videos on Learning Exchange, you can see the history of you viewed tutorials on “My account” page. You can also "Like" your favorite tutorials, that way they will be listed on you “Liked tutorials” tab on My Account page.
Also, if you are interested in structured learning, we have eLearning courses created by our training professionals. These courses are organized by subject, they include additional materials for practice, and you can monitor your progress on the course, keep history, bookmarks, and take notes. If you are interested, please feel free to contact us for a free demo: http://www.ptc.com/services/training/elearning/request-demo/
Thank you,
Maria