If you only have one appendix in your thesis, adding that is pretty straightforward. It is mostly treated like another chapter, except "Chapter" is changed to "Appendix". When you have more than one appendix, it gets more complicated and you have to add a List of Appendices in the front matter part of the thesis. The video tutorial demonstrates how to add a single appendix, how to format multiple appendices, and how to add the List of Appendices to the front of the thesis.