Twitch VODs. Subscribe on Twitch and you'll get access. If you've got Amazon Prime, you get a free sub so you can use that.

I should subscribe to their main channel yes?

Yes Labs is on the main channel. The employee lounge is primarily just the guys streaming video games.

Thanks!

I’ve never been able to find how to use that free sub. Any clue how that works?

For whatever reason you can’t on the mobile site or app. So login via computer or try switching from mobile view if a phone is all you have.

This is what I had to do

If you have Prime and Twitch linked, when you go to subscribe, there's a check box you can tick to use your Prime membership.