The podcast invest Like The Best had an interview with Bill (acclaimed Venture capital investor in Uber, Twitter and Instagram). He discusses network effects throughout the entire podcast and is a great listen. At minute 16, he discusses Zoom for thirty seconds and the network effects surrounding their service. I have always found the concept of network effects to be confusing and hard to figure out. He gives some great examples of network effects and how they were started.
He also talked about NextDoor (where SQ CFO Sarah Friar landed as CEO). It seemed like a weird move at the time but Bill Gurley discusses in length the possible network effects for the business.