It can be difficult to keep track of all the great events that stream online and air on TV. Forekast is a crowdsourced calendar that its community updates with interesting live streaming classes, movie debuts, AMAs and other events.
When I first stumbled upon Forekast, I found out about Elon Musk's AMA that evening and tuned in. It's useful if you don't have the time or energy to regularly visit a dozen sites to find out when there's a new class, keep tabs on when someone famous is doing an AMA, or for discovering things you didn't even know would be live streamed (like the World Economic Forum).
Each entry in Forekast has comment threads, which can inform (or entertain) you. If you sign up for Forekast, you can also set up reminders for specific events.