"I do love watching him," Henry said on CBS Sports. "Goals and assists. He is just having fun this season, but he is adding goals this year.
"He's in the national team now. His confidence... the world wants him."
Meanwhile, his former Leipzig manager, Jesse Marsch, who is now the boss at Leeds United, said the Frenchman has "no weaknesses".
Marsch said to the German club's website: "Christopher has no weaknesses. He is young and still wants a lot more.
"It's always a good thing when a young player listens to the things we say and also wants to implement them. Working with him is a lot of fun and he is really intelligent and has a lot of potential."