It seems that the Kurzgesagt development team makes their livelihood by creating and distributing these videos. Although we may appreciate their work, and direct others to it, if we copy their content and distribute it without them, they won't have a job anymore and can't make more videos.
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If you want to help their team you can make a donation to Kurzgesagt: https://www.patreon.com/Kurzgesagt
I give to them money by watching their content for which they are paid. They have over 6 million subscribers on YouTube. The evolution video that you copied is located:
https://youtu.be/hOfRN0KihOUand has over 5.5 million views.