For your better understanding, you can download various supplementary material such as the subtitles of the videos with time information (these may help you to find the respective sequences in the video more quickly). Lists of the materials, tools and aids needed to make the ring can also be downloaded as PDF files. There are also explanatory sketches. I recommend that you download all the files onto your computer and print them out before you start working.
By the way, I think it is great that you are taking part in this course and I wish you good luck!