Enhance migration documentation with video

Added a video link for validation after migration and clarified migration behavior details.

Author: ssindhub

articles/data-factory/how-to-upgrade-your-azure-data-factory-pipelines-to-fabric-data-factory.md

@@ -119,6 +119,8 @@ After the migration completes, go to the folder you selected in the Fabric works
 
 After migration completes, validate the pipelines in the Fabric Data Factory experience.
 
+> [!VIDEO  https://learn-video.azurefd.net/vod/player?id=4704fb66-2ce2-44a6-a024-4a00c0963b42]
+
 ## Migration behavior
 
 - Pipelines migrate into a Fabric Data Factory workspace.