Stop youtube video on modal close on css?

Question

Video

I did not find a suitable answer for myself.
I close the modal window, the video is playing. It is necessary that when the modal is closed, the video also stops.
html code:

Answer 1

js only

Answer 2

Throw off the code on jsfiddle.net
And look here https://developer.mozilla.org/en-US/docs/Web/Guide...
You hang two events closing and pause or stop