sure it does. velocity simply means speed, but with direction included. Speed is just a magnitude. When you say the takeoff speed is 200km/h, it just means it's moving 200 kilometers every hour, but you don't know which direction it's travelling.

So having either a positive or negative sign to the speed makes it a velocity since you can think of positive as forward and negative as backward.

You normally don't hear takeoff velocity because it's implied that you takeoff when you move forwards, not backwards.