https://github.com/01-Scripts/2Click-Iframe-Privacy
there is clearly an MIT license, but the website of the same project states that it is a non-commercial-license and that we would need to pay in order to re-sue the solution on a commercial website: https://www.01-scripts.de/2click-iframe-privacy.php
This is kind of strange, because there is even a MIT license file on github not stating the same thing as on the website: https://github.com/01-Scripts/2Click-Iframe-Privacy/blob/master/LICENSE
So I don’t know what to think of this.
Another solution (also described in German ) is here https://www.codepalm.de/post/youtube-2-klick-loesung/
Also, I found a plugin
for wordpress: https://github.com/dword-design/wp-video-embed-privacy
Adding this possibility to the widget parser function would be great!