Can someone please give me css code for my prodcut description video width?

Hi

can someone please give me CSS code for my product description video width? I can’t edit it or make it smaller or bigger.

I want the video width to be 410×410 px

please check the link
I want the width of video to be same as picture, the picture width is 410×410 px.

thanks

The page I need help with: [log in to see the link]