I filled the same guide but I don't have a nice browser like that... Is that an app you installed?
Discussion
Alpine Linux kual app (which comes with Chromium browser).
You're right, I guess it wasn't part of that guide, but it was in the description of that video.
I tried a bunch of web based nostr clients but the only one that worked first try was nostr.band.
Realizing now I hadn't watched the second part of the video. 😂
Was too busy exploring.