I was introduced to Kurzgesagt video's through my education at the university, you can check out the sources for yourself, these are also all very easy to follow. This one was relevant in terms of effective altruism, but they're all both fun and highly educational.

The next video is not really about global warming, but about us humans and I recommend that if you do watch it, that you watch it all the way through because it's very interesting and I think it makes some important points.

This last one is also one of my favourites.