APA Style now has multiple possibilities for citing the kinds of resources you use in your capstone work: data sets, YouTube videos, online forums, online courses or MOOCs, and more. You may want to consider citing your sources in this style as it has guidelines for all of these.
Your instructor recommends that you use Zotero to manage your citations in this class. Zotero (pronounced "zoh-TAIR-oh") is free software that helps you collect, manage, and cite research sources.
Zotero allows you to attach PDFs, notes, and images to your citations. It also allows you to organize them into collections for different projects, and create bibliographies using Word or other word processing software.
Remember there's an entire community of folks doing the kinds of work you're doing (as well as sharing their work via video tutorial)! Use these folks as a resource and/or to find out what problems are getting approached and how.
Not all information is created equal. Remember: anyone with Internet access can publish on the Web. There is no editor, fact checker, or peer review process for the "free" content that is available on the visible Web.
As scholars and information consumers, you must choose the best and most reliable information that meets your research needs. This linked guide provides several strategies for being a Savvy Information Consumer.