changed embedding style

Author: superojla

content/guides/cli/quick-start/0-index.md

@@ -18,7 +18,13 @@ non-technical users to leverage the Box API to perform routine or bulk actions.
 There is no need to write any code, as these actions are executed through a set
 of [commands][commands].
 
-<YouTube id='whxT3Bdx3E0' />
+<div style="position: relative; width: 100%; padding-bottom: 56.25%">
+<iframe src="https://www.youtube.com/embed/whxT3Bdx3E0" 
+        title="Get started using the Box CLI in less than five minutes" frameborder="0" allowfullscreen
+        allow="accelerometer; autoplay; clipboard-write; encrypted-media; gyroscope; picture-in-picture" 
+        style="position: absolute; width: 100%; height: 100%;">
+</iframe>
+</div>
 
 ## Overview