Show video license on talk pages with videos

[Jonty]

We currently do not have the license for our videos listed anywhere on the website. We say "under a creative commons license" on https://www.emfcamp.org/about/privacy but not which one.

The CCC media website does not list licenses (ticket here voc/voctoweb#190), youtube links to the license in the footer of the video (unsure if this is consistent across our videos).

We should add the license to talk pages under the video, if it has a video.

We can either do this by:

• Specifying the license that videos were published under (CC-BY 3.0 for 2023, CC-BY-SA 4.0 for 2024, etc) and showing that
• Relicensing everything to CC-BY-SA 4.0 and hardcoding it as a string

Suggest we just relicense everything as it's less work, more consistent, and the licenses are better anyway.

If we relicense we also need to update all the existing youtube videos. I'm unsure how we update the license that was fed to CCC media and stored in the backend.

[Jonty]

Russ says you can't actually choose which CC license youtube uses, which is unhelpful.

The videos link to https://support.google.com/youtube/answer/2797468, which links to https://creativecommons.org/licenses/by/3.0/legalcode and implies CC-BY 3.0.

I'd suggest we put the license in the video description but that seems like a lot of work. Possibly best to just ignore it.