I think these yt channels qualify, not exclusively solarpunk though:

• Andrewism
• Not just bikes
• Our changing climate
• Climatetown
• Adam Something
• Just have a think

As for podcasts:

• Drilled
• Future Ecologies
• Solarpunk Now
• The Fire These Times
• The Great Simplification(althou that one can get really depressing sometimes, so be aware)

As for YouTube:

• EcoGecko
• Andrew Millison
• Kirsten Dirksen
• The Solarpunk Scene
• Just Have a Think

We have !podcasts@slrpnk.net which mentions some good ones.

Lately I listened a bit to https://solarpunkpresents.com/

Why This Gives Me Hope for the Future (ft. @Andrewism)

Commenting so I can check out later.

How To Build A Solarpunk City

Somewhat related but adding onto this, look up cycling advocacy groups in your area to subscribe to their newsletter and attend events. This makes real change in your community.

Solarpunk Prompts, if you’re a writer.