They're trying to take on twitch. Everyone wants the money that twitch is raking in. They even sell it as "Do a watch party with your friends".
It doesn't work at all. Tried mobile, tried desktop, tried lying on the desktop to make it think I was mobile, tried different browsers.
It doesn't work at all.
Getting the entire series of Firefly isn't that hard, I see it in resale shops a lot. It's just the one season.
Update: Works in chrome today.
Interesting thing. There is a throwaway joke about spiders not being as scary as Nazi's, unless it's Nazi's crawling over your face. Later in that episode, there are swastika's painted on the wall, but the nightmare creature turns out to be... a clown. Maybe the network told them to turn it down a bit?
Either way the clown get's KO'd, so that was nice.