IftiBashir
Undiscovered....
The Rode range of mics are usually highly recommended.
I personally use the Audio Technica ATR 3350. It is inexpensive, and because it's a lapel mic, you can move around without having to worry about change in sound quality. The Rode Videomic is really great, but more expensive, so it depends on how much you're willing to spend to do a vlog on YouTube. My advice is to just use a lapel mic. You won't have to worry about the cam being fixed in one place, and you can put an extension on it as well if you need to move further away from the camera at times, and you won't need a second person to operate a boom mic if you need to move around.