Yeah, the promo video is very odd. It clearly looks like twitter, but if you look closely, the url is sola.na/actions which points to a totally different page. Also there is no way in hell Elon will allow them to have iframes like that.
Discussion
Ok, so it turns out you need a browser extension to view the nice UI instead of just a link. https://x.com/solana/status/1805942449187250596