On-Demand videos should live here: https://community.jmp.com/t5/Tutorials/tkb-p/learn-jmp-tutorials-tkb
You can't directly link to the Community from AEM. You need to create a dummy on-demand page and then redirect it to point to the on-demand in community,
https://aemauthor.unx.sas.com/sites.html/content/jmpbp/en/events/ondemand/mastering-jmp
It does not matter what the page says, but you will want to properties to be correct and the title so you know what it is, like here:
https://aemauthor.unx.sas.com/editor.html/content/jmpbp/en/events/ondemand/mastering-jmp/new-in-jmp-16-and-jmp-pro-16.html
2. And under Advanced tab, create a redirect to the community. Then Publish:
https://aemauthor.unx.sas.com/editor.html/content/jmpbp/en/events/mastering/topics/new-in-jmp16-and-jmp-pro16.html
4. Under the List Group> Fixed List you create this box with a link to the dummy ondemand page (mine is /content/jmpbp/en/events/ondemand/mastering-jmp/new-in-jmp-16-and-jmp-pro-16)