I am doubtful about this. Don't get me wrong, I love the taste and aroma of stinging nettles, but neither seems a good replacement for hops. They're not bitter, even a little sweet, and kinda nutty/umami.

I'd rather see nettles as an addition (not complete replacement) to the maltiness.

That said, lots of hop-less beers exist, whole traditions around it.

I haven't tried of course, and the video probably cannot answer that question either - or can it?