You can live stream on Youtube in a few steps. This video by Mr Technology summarize very well how to do it.
Introducing Starstream: a game-changing addition to Shopify that lets you sell tickets to live stream events. With zero production costs, easy setup, and the potential for infinite profit, live streaming is a groundbreaking online business idea. Starstream facilitates an effortless selling experience and a chance to offer unique, interactive content. The low price point minimizes customer risk and encourages experimentation. To start, simply set up your Shopify store and add the Starstream extension. The future of online business is here, and it's ready to go live!