Scoring question

[scude]

I'm new to the forum so I apologize if I'm posting in wrong place. I've attached a video containing 2 serves. My question is about the second serve.
Why, when the ball clearly hits the top of the net & lands on Chen's (on right) side of the table was the point awarded to Chen when she was not able to return it?

Thanks.

 

[backspacer]

Bad angle, but I don't think it hit the top and went under the net to the other side.

 

[Tony's Table Tennis]

the ball went under the net