&chill - Watch YouTube & Twitch videos with people online
WWDC app for OS X - An app to view and watch WWDC sessions on your Mac
Netflix Party - Netflix Party is an extension for watching Netflix remotely with friends and family for movies nights with that long-distance special someone.
WWDC Together - Watch and discuss WWDC together
Jelly Party - Watch anything together.
WWDC for macOS Version - The best way to watch WWDC on the Mac