This article discusses how to watch Instagram Live videos from any desktop web browser via Instagram.com. If you have a casting or screen mirroring device, you can watch it on a TV screen.
You can view Instagram in a web browser using the following steps:
Go to Instagram.com on a desktop browser and log in to your Instagram account.
Look at your stories feed at the top of your main feed. If someone is currently streaming live video, their profile picture will appear at the front of the feed, labeled LIVE.