Can’t Create Product Archive

I think I figured out how to get it created (it is different than in the video) but now I can’t figure out how to get this archive to appear anywhere other than as it’s own separate page. How do I embed it on a regular page?

You don’t embed archive templates on pages. You set its Display Conditions (via the Publish/Update button – arrow next to it) that determines which content the template will apply to. Try keeping it simple for now and just have it use a Condition of All Archives. Then just go look at one of your archives (like yourdomain.com/shop/mywidgets). The template should be applied to each of the archives automatically.