BreadTube (Solarpunk)

Besides mentioning "We have the technology and knowledge to fix the planet", I didn't notice her say anything else that could be construed as techno-solutionism. Solarpunk itself assumes some level of technology used appropriately and sustainably to achieve a desirable yet non-polluting or destructive society, so I don't see anything objectionable from that statement. The first segment in the video also goes into how there is a tremendous amount of bad things happening.

As for tackling specific doomer arguments like Limits to Growth or resource scarcity, I don't mean to speak for her, but it may be that she doesn't fundamentally disagree with those warnings, yet just doesn't think they'll spell the doom of us all and to just give up. According to her video on economies, she seems to be a fan of Degrowth, and favorited this comment there by TheQuietPartIsLoud:

Green growth really is it's own oxymoron. I especially have been hearing a lot of people talking about changing populations, and the slowing of population growth as some sort of apocalyptic issue for global economies. And the hilarious thing is that people espousing alarmism regarding population slowing forget to ask "Why the hell does our economy HURT us if we don't reproduce at an unsustainable pace?" Maybe because global economies >aren't?? sustainable?? Lmao.

Great video, the more that is said to counter lazy, and defeatist looks at where economics, and sustainability intersect, the better. Degrowth ftw.