Docs: adds video content to Grafana Alerting (#50929)

* Docs: adds video content to grafana alerting

* adds create alerts to managed rule page

docs/sources/alerting/_index.md

@@ -14,6 +14,8 @@ Grafana Alerting allows you to learn about problems in your systems moments afte
 - Create and manage Grafana Mimir and Loki managed alerts
 - View alerting information from Prometheus and Alertmanager compatible data sources
 
+Watch this video to learn more about Grafana Alerting: {{< vimeo 720001629 >}}
+
 For new installations or existing installs without alerting configured, Grafana Alerting is enabled by default.
 
 | Release     | Cloud         | Enterprise    | OSS           |

docs/sources/alerting/about-alerting.md

@@ -22,6 +22,8 @@ These three individual concepts are the minimum necessities to successfully crea
 
 We will also touch on various other concepts such as [silences]({{< relref "silences/" >}}) and [mute timings]({{< relref "notifications/mute-timings/" >}}) to more granularly manage alert notifications, [role-based access control]({{< relref "../enterprise/access-control/" >}}) to limit access and manage permissions and additional advanced topics such as [external alertmanagers]({{< relref "fundamentals/alertmanager/#add-a-new-external-alertmanager" >}}) and [high availability]({{< relref "high-availability/" >}}).
 
+Watch this video to learn more about creating alerts: {{< vimeo 720001934 >}}
+
 ## Overview
 
 {{< figure src="/static/img/docs/alerting/unified/about-alerting-flow-diagram.jpg" caption="Grafana Alerting overview" >}}

docs/sources/alerting/alerting-rules/create-grafana-managed-rule.md

@@ -17,6 +17,8 @@ weight: 400
 
 Grafana allows you to create alerting rules that query one or more data sources, reduce or transform the results and compare them to each other or to fix thresholds. When these are executed, Grafana sends notifications to the contact point. For information on Grafana Alerting, see [About Grafana Alerting]({{< relref "../about-alerting/" >}}) which explains the various components of Grafana Alerting. We also recommend that you familiarize yourself with some of the [fundamental concepts]({{< relref "../fundamentals/" >}}) of Grafana Alerting.
 
+Watch this video to learn more about creating alerts: {{< vimeo 720001934 >}}
+
 ## Add Grafana managed rule
 
 1. In the Grafana menu, click the **Alerting** (bell) icon to open the Alerting page listing existing alerts.

docs/sources/alerting/alerting-rules/create-mimir-loki-managed-rule.md

@@ -28,6 +28,8 @@ Grafana allows you to create alerting rules for an external Grafana Mimir or Lok
 
   - **Grafana Mimir** - use the [legacy `/api/prom` prefix](https://grafana.com/docs/mimir/latest/operators-guide/reference-http-api/#path-prefixes), not `/prometheus`. The Prometheus data source supports both Grafana Mimir and Prometheus, and Grafana expects that both the [Query API](https://grafana.com/docs/mimir/latest/operators-guide/reference-http-api/#querier--query-frontend) and [Ruler API](https://grafana.com/docs/mimir/latest/operators-guide/reference-http-api/#ruler) are under the same URL. You cannot provide a separate URL for the Ruler API.
 
+Watch this video to learn more about how to create a Mimir managed alert rule: {{< vimeo 720001865 >}}
+
 > **Note:** If you do not want to manage alerting rules for a particular Loki or Prometheus data source, go to its settings and clear the **Manage alerts via Alerting UI** checkbox.
 
 ## Add a Grafana Mimir or Loki managed alerting rule