that the library (both the original as well as the community edition) are MIT licensed,
that the code for Grant's videos (3b1b/videos) is open-source but copyrighted (in particular: Pi creatures are protected),
that videos created with Manim are allowed (and actually even supposed) to be shared online; no attribution of Manim is required (just much appreciated)
would do the job. Help coming up with a suitable wording is very welcome!
Title, basically.
I imagine one well-worded paragraph mentioning
would do the job. Help coming up with a suitable wording is very welcome!