Hmmm.... the first video is pretty good, but I wouldn't say it's reasons to be optimistic. I think more reasons to not give up hope... or to save space for optimism. I agree that doomerism and pessimism is toxic and counterproductive. If all the doomers would just join team yay-future, we'd turn things around much faster!

As far as technological solutions go, I think we absolutely know the way forward. It's social behaviour and political will that are holding us back, but that will probably change quickly if we experience some unfortunate climate shocks, which is likely to happen over the next few years. I'm just hoping those shocks won't be too bad, and the response will be strong!