I generally live solve problems and try to explain them as I solve.
I graduated 2 years ago and have been streaming from an year+
I think I use simple solutions, clear proofs and also provide general tips.
Today's Stream : https://www.youtube.com/watch?v=Vu4nY7A7dDw [ Solved A, B, E ] thought E was cool.

1) Solutions are simple.
2) Proofs are simple.
3) Implementations are simple.