Just thought I'd also mention that he likes to do "case studies" where he reverse engineers effects from different games in Unity using mostly Cg shader code (Ice from Spelunky, Golden Cards from Hearthstone, Bomb explosions from Zelda, etc.)

Sebastian Lague has some great vids on Unity https://www.youtube.com/channel/UCmtyQOKKmrMVaKuRXz02jbQ