I want to learn a type of dance but I don't know what it's called?

Music videos often have hip hop or street jazz in them. It can also just be commercial dance, Almost all basic western world dance starts with ballet classes.That is where you build basic technique to do other forms of dance. The dancers you see dancing in music videos have all had ballet training first. At least to be able to be at the level they are at. If this is just for fun then look for a hip hop class. Street jazz really requires some ballet training to excel in that.