Apply suggestions from code review

Co-authored-by: Heitor Tashiro Sergent <[email protected]>

Author: mdcruz

docs/sources/next/_index.md

@@ -38,11 +38,9 @@ k6 will help you to build resilient and performant applications that scale.
 
 k6 is developed by [Grafana Labs](https://grafana.com/) and the community.
 
-Watch the supplementary video below to learn more about k6 and why it could be the missing puzzle in your Grafana stack.
+Watch the video below to learn more about k6 and why it could be the missing puzzle in your Grafana stack.
 
-<div style="position:relative; padding-bottom:56.25%; height:0; overflow:hidden;">
-  <iframe style="position:absolute;top:0;left:0;width:100%;height:100%;border:0" src="https://www.youtube.com/embed/1mtYVDA2_iQ?si=VMIqNldoPwCb03eK" title="YouTube video player" frameborder="0" allowfullscreen></iframe>
-</div>
+{{< youtube id="1mtYVDA2_iQ" >}}
 
 ## Key features
 

docs/sources/next/using-k6-browser/_index.md

@@ -20,11 +20,9 @@ To work with the browser module, make sure you are using the latest [k6 version]
 
  {{% /admonition %}}
 
-Watch the supplementary video below to learn more about k6 browser.
+Watch the video below to learn more about k6 browser.
 
-<div style="position:relative; padding-bottom:56.25%; height:0; overflow:hidden;">
-  <iframe style="position:absolute;top:0;left:0;width:100%;height:100%;border:0" src="https://www.youtube.com/embed/N7VJ9X5yAKo?si=qVMF6niRHvZZLHl4" title="YouTube video player" frameborder="0" allowfullscreen></iframe>
-</div>
+{{< youtube id="N7VJ9X5yAKo" >}}
 
 ## Use case for browser testing