Trying to setup a separate menu in sidebar for each parent page

Hello,

I am setting up a membership site that is going to have about 130 videos categorized into 6 different modules. I am trying to set up my site so that if you click on Module 1, then down the right hand sidebar I can place a menu of all the videos in that module.

You can see the page here:

https://listbonus.com/marketingpros/

I figure that if I place the videos as under the parent page of the appropriate module, then I should be able to setup a menu of just the pages under the current parent.

Any ideas, or plugins that will do this?

Thanks,

Jon