add cli demo video

Signed-off-by: Joshua Li <joshuali925@gmail.com>

Author: joshuali925

…ight-docs/src/content/docs/deploy/aws.md …ght-docs/src/content/docs/deploy/aws.mdxdocs/starlight-docs/src/content/docs/deploy/aws.md renamed to docs/starlight-docs/src/content/docs/deploy/aws.mdx docs/starlight-docs/src/content/docs/deploy/aws.md renamed to docs/starlight-docs/src/content/docs/deploy/aws.mdx

@@ -21,6 +21,12 @@ bash -c "$(curl -fsSL https://raw.githubusercontent.com/opensearch-project/obser
 
 Takes ~15 minutes. See [aws/cli-installer/README.md](https://github.com/opensearch-project/observability-stack/tree/main/aws/cli-installer) for full options.
 
+#### Demo
+
+Some loading time is cut from the video.
+
+<video src="https://github.com/opensearch-project/observability-stack/releases/download/v3.6.0-alpha.1/observability-stack-aws-cli.mp4" controls></video>
+
 ### CDK
 
 Infrastructure as code using AWS CDK. Deploys two stacks — one for the OpenSearch domain and Prometheus workspace (~17 min), one for the OSIS pipeline, dashboards, and optional demo workload (~6 min).