Though I think its pretty optimistic, the narration and tone of that video to me sounded like they're telling a dystopian narrative of the future, especially with the casual mention of Elon Musk at the beginning of their prediction along with some of their timelapse videos. Coupled with a monotonous voice (which kind of improves later on, I guess), that kind of voice (which changes but doesn't help) would make some people get tipped off or nerved by the future rather than get interested by it.
Maybe it's just me but some larger channels are really invested into making the future look grim and cinematic. I don't like the fake, cheerful optimistic tone of some videos, but this video feels dark if you listen to the voices closely from a different view like me.