This video feed only works in Safari and Microsoft Edge; the good news is that it works on macOS, iOS and Windows 10 – chances are you have at least one device running Safari or Edge.
So to recap, here’s how you can watch today’s Apple event:
Safari on the Mac or iOS.
Microsoft Edge on Windows 10.
An Apple TV gen 4 with the Apple Events app in the App Store.
An Apple TV gen 2 or 3, with the Apple Events channel that arrives automatically right before the event.
https://www.apple.com/apple-events/september-2017/
So to recap, here’s how you can watch today’s Apple event:
Safari on the Mac or iOS.
Microsoft Edge on Windows 10.
An Apple TV gen 4 with the Apple Events app in the App Store.
An Apple TV gen 2 or 3, with the Apple Events channel that arrives automatically right before the event.
https://www.apple.com/apple-events/september-2017/