Problem with Embedded video proportion

Hi!

I installed a3 lazy load some time ago, and now I noticed when embedding a new video from Youtube within Gutenberg, that the videos where not shown correctly. The were cut out at the sides. I disabled the videos lazy load and now they are shown again correctly.

I tried making changes on the css, but I couldn’t make them look right both on mobile and desktop view, and also I don’t think it is the best way. Maybe there is other option?

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