curtainsjs VS Mo.js

If you're purely wanting to add a shader effect then as a newcomer to the shader world I'd recommend curtainsjs as an easy way to add custom shaders without the hassle of having to deal with low level WebGL setup stuff. They even have a similar example with the mouse distortion effect where the code is much more readable and well commented with another codepen by the creator of curtains which has a more similar mouse flow effect that could be repurposed to be a post effect shader and distort the output of a gradient shader.

Curtainsjs - Lightweight vanilla WebGL JavaScript library that turns HTML DOM elements into interactive textured planes.

Mo.js is a potent and adaptable JavaScript animation library with a straightforward API and browser support. It's distinguished by its high-performance animations and density-independent effects, ensuring outstanding visual quality on any device. Mo.js provides extensive tools for animation creation, including Player for animation control, Curve Editor, and Timeline Editor for custom easing and editing.

mojs.github.io

Javascript touch events paired with WebGL would be the route I’d go. There are some really great libraries for WebGL (twojs) or working with SVG (mojs) if you want to keep it simple

13. mo.js

d)MoJS

I've looked around and found Mo.js which seems super cool, but it doesn't look like animations can be exported as a video? I want to avoid having to screen record if I can because I feel like the video quality is never as good as had it been directly exported.

Animation. You are creative, and you want your site to grab users' attention at first sight. JavaScript is there for you. With modern frameworks and libraries, such as Three.js,Anime.js,Mo.js any imaginable animation is possible.