Many newcomers meeting trouble in-game trying to understand what the hell is going on around here. There people running around, calling some signs, ordering tactics, firing guns and so on. And the first expression is kinda stoned. And even tho after a brief explanation on how to move around and shoot people, you realize you have no idea of where the threat comes from.
Barabulyko decided to give a hand to newcomers, and created a short video explaining some basic rules of CS nature. Even if you are a mature gamer, you still may find some advices helpful, since it never hurts to refresh the basics (:
Long story short: Welcome to Counter-Strike!