Quick Start: Visual Studio Code for Salesforce Development: Deploy issue

 I am referencing the 'Deploy' instructions and video on the Visual Studio Set up - i am trying to 'Deploy the Source to Org', however it does not seem to work. (no update in the 'OUTPUT' tab in the Terminal).; and I am unable to verify the task to complete. Am I missing something here? Any advice appreciated. I will also post on the Community