Years ago, someone on the initial SL site suggested the Great Courses when I complained about struggling to find a continuing education site. I bought and enjoyed a number and shared with friends.
A recent catalogue shared the option of online streaming of 13,000 courses by college professors for a modest monthly charge in C$. No more DVD's to store, no shipping charges so I am in totally, signed up and loving it. I give myself an hour's treat each day choosing the course that twigs that day's interest. I love it!
Sharing in case others might find this meets their need.
https://duckduckgo.com/?q=the+Great+...=v184-1&ia=web