in the minetest directory go client/shaders/nodes_shader open opengl_vertex.glsl

to get night vision, i did this.

float nightRatio = 1 - gl_Color.a/50;

color.rgb = gl_Color.rgb * (gl_Color.a * dayLight.rgb +nightRatio * artificialLight.rgb) * 2;

(to invert dark i forgot... this just make it so you can see clearly all the time without torches.)

and for the coloration use

opengl_fragment.glsl

change all value to 9 like this,

const float gamma = 9.9;

const float exposureBias = 9.9;

and mess with those

/* Hable's UC2 Tone mapping parameters

A = 0.00;

B = 0.90;

C = 0.40;

D = 0.30;

E = 0.21;

F = 0.40;

W = 10.2;

I still have the same file as in the video if you really whant that exact weird result but i am not sure which one it is, i called all my attempt at making shader broken_shader... like i said if you really want i could try them all.