How to edit margin around embedded video, big white space below and right

Hi,

I’m using the Pinboard theme. I’m trying to get rid of the space between my 2 videos on the lower part of my home page.
Even with just one video embedded there was a huge white space below and on the right of the video.

Can anyone tell me how to edit the margin around the videos so that I can have them 2 next to each other and with the footer closer to it?

https://frenchlegendsrugby.com/