Befunge!
7:24
MarioLANG!
13:17
Uyjhmn n! [Original Esolang]
17:41
Malbolge!: Taming the Beast
16:31
[Carlventures] FALSE!
15:42
Ghost Evade! Writing a game in the worst programming language
13:08
"Hello, World" in 5 CURSED languages that no one should use
11:00
Alors j’ai inventé une langue…
9:27