Pretty sure the clouds one is a straight rip from one of Inigo Quilez's shaders: https://www.shadertoy.com/view/XslGRr (note the licence at the top...)
Definitely getting some 'can I copy your homework' vibes. But then again, if you use the original shader to educate yourself on how to render volumetric clouds... this is the kind of code you'll end up writing afterwards.
And pretty much everyone writing any shadercompo-style code ever ends up borrowing some techniques from iq :).
ngmi
Jokes aside, pretty much no client side javascript allows this restriction. Its a tale as old as view source.
My mantra is “do things worth suing over”. Prideful restrictive in line comments don't pass that bar for me.