Moodle just serves. What you have created with iSpring probably needs protections built into it.
Please see:
https://www.ispringsolutions.com/articles/content-protection-in-ispring-cloud-setting-up-password-and-adjusting-download-settings
You have no copyright notice - to which a viewer would be forced to at least the page that describes? ... even if user doesn't really read it ... just accepts. How about roll credits in the videos?
Many years ago, when first learning how to build a LAMP stack server for Moodle and other open sourced software (not designed really to be 'closed') I found a web page written that described the entire process acurately. Not desiring to rely on bookmarks or other means of referencing the resource, I 'webwhacked' the page ... downloaded the whole thing ... including images author had used. Then stuck that webwhacked page+images on a server of my own. BTW, there was no copyright notice on the page at all.
But the author wanted to know ... so what the author did ... some of the images on the page were full url images ... so my 'webwhacked' page was actually going back to his server images to acquire the images.
I heard from the author via EMail one day about that ... he said he didn't mind but asked if I would to add a link/reference to the original work. Fair enough ... credit where credit is due.
Might be worth your time to investigate copyright law from users nations - might even provide various links in your copyright notice to those sites along with a warning that violators would be pursued. Good luck with any legal proceedings internationally, BTW.
Just sharing 2 cent thoughts ... best of luck!
'SoS', Ken