Update README.md

Author: abooarulraj

README.md

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 A quick-start project that helps you create the Blazor TreeView of Syncfusion in a Blazor server application. This sample explains how to bind a hierarchical data and enable checkboxes, node editing, multiple selection and drag/drop feature.
 
-Watch the video now:<coming soon>
+Watch the video now: https://www.syncfusion.com/tutorial-videos/blazor/treeview?title=create-a-treeview-in-a-blazor-server-application
 
 Documentation: https://blazor.syncfusion.com/documentation/treeview/getting-started