The youtube video covering it has an interesting run through of the desktop environment in the final section https://www.youtube.com/watch?v=eGS9su_inBY&t=2418s. But I agree a screenshot or two wouldn't hurt.
Tinfoil Hat Take: Avoiding screenshots on the project page drives eyeballs to YouTube, which the provides ad revenue, which then feeds back into the project.
That video is very annoying and doesn't in any way replace just having a screenshot of it running.