you could do screenshots, but my preference would be a video with the text instructions as the description, with timestamp links.

text with images is a pain to scroll, and in video form you have one more channel of info - sound.

the visuals are there to tell you where it is you find the different things, or so you dont go hunting for a button that doesnt actually exist on a gui, but also so you can match the confirmation, and get an idea on if its running at about the right speed