Here is I present you some of my videos:

Trick Jumps:
NS2 Guide: Marine Trick Jumping (Rus speech + Eng sub)
Skylights vent jump with armory (No speech)
Tram - Mezz Vent - Power Node Jump (No speech)

Basics:
Some basics in 6v6 NSL (Rus speech + Eng sub)

Abuse:
Resource stealing (No speech)
Countermines skulk (Rus speech only)

If I'll decide to make anything else I will add it in this thread.