Hi There,
You can add the page-id class to the selector of that css code, so it would only apply to that specific page.
e.g.
@media ( max-width: 600px ){
.page-id-xx .x-video.with-container {
padding: 1%;
}
}
Replace xx with the actual page ID.
How to Locate Page/Post IDs
Hope it helps, Cheers!