Adding a video { width: 100%; } (#4204)

* Adding a video { width: 100%; }

This is to prevent that videos included in pages don't exceed the page border

* Reverting precedent commit

* Adding a video { max-width: 100% } instead

Author: snowc0de

resources/sass/_pages.scss

@@ -182,6 +182,10 @@ body.tox-fullscreen, body.markdown-fullscreen {
   .cm-editor {
     margin-bottom: 1.375em;
   }
+
+  video {
+    max-width: 100%;
+  }
 }
 
 // Page content pointers
@@ -452,4 +456,4 @@ body.tox-fullscreen, body.markdown-fullscreen {
   @media (prefers-contrast: more) {
     opacity: 1;
   }
-}
+}