Embed two visualization videos from the Grafana for Beginners series (#83928)

* Embed two visualization videos from Grafana for Beginners series

* Implementing Isabel's recommendation on second video placement.

* edited introductory sentence to the second video.

* Added line between text and video

---------

Co-authored-by: Isabel Matwawana <76437239+imatwawana@users.noreply.github.com>

docs/sources/panels-visualizations/visualizations/_index.md

@@ -20,6 +20,8 @@ weight: 10
 
 Grafana offers a variety of visualizations to support different use cases. This section of the documentation highlights the built-in visualizations, their options and typical usage.
 
+{{< youtube id="JwF6FgeotaU" >}}
+
 {{% admonition type="note" %}}
 If you are unsure which visualization to pick, Grafana can provide visualization suggestions based on the panel query. When you select a visualization, Grafana will show a preview with that visualization applied.
 {{% /admonition %}}
@@ -51,6 +53,10 @@ If you are unsure which visualization to pick, Grafana can provide visualization
   - [Text][] can show markdown and html.
   - [News][] can show RSS feeds.
 
+The following video shows you how to create gauge, time series line graph, stats, logs, and node graph visualizations:
+
+{{< youtube id="yNRnLyVntUw" >}}
+
 ## Get more
 
 You can add more visualization types by installing panel [panel plugins](https://grafana.com/grafana/plugins/?type=panel).