@iowen , greetings! As Ken said, Canvas doesn't have the ability to layer content in the "Module" format. Yet, what I do is create a page (think of it like a "folder) in a Module and then add in all my files, links, video etc. So in this way my module doesn't look as overwhelming because I have the resources for a specific Module all contained on one page in the Module. I do this using the rich content editor on the page and adding links, files, pages, etc.
These guides explain how to do this:
Below is an example of how one of my "Resource" pages looks from Modules - it is "Week 2 Resources."
Then this is what the "Week 2 Resources" page looks like once you click on it. By setting things up this way, I don't have all of these links to resources on the Module page and it makes it easier for students to find what they need/are looking for.
Hope this helps! Kona