The 16 year-old midfielder signed for United during the summer from Ajax.
"There is really a family atmosphere. At lunch you can see that the big stars sit at the table of the youth players and talk with us. Everyone wants to help each other," revealed Van Velzen.
"The training is a lot heavier than I was used to at Ajax. In the beginning I had to put in a lot of effort to keep up. Fortunately, now I am better. I am satisfied with my teammates.
"They are guys who give you a compliment when you do it right, but they put you in your place when you do something wrong."