Trying to download/screen record video from website

Hello,

Conext/ethical concerns: I have been given access to a website which gives access to courses like coursera or khan academy. The only problem is that the owner of the website has completely abandoned the website and refuses to offer any support. I have paid full price for these courses, and they will expire in a few days. I need these videos for my education.

The website won't even allow for a left click. When trying a chrome plugin to download the video, they download corrupted, and screen recording does not work, the screen goes blank.

I really need a solution here.

Can someone please help? I'll pay :)