Whilst they're on they are free to watch. And over the weekend they just loop the live bits for other time zones.
I think you're able to buy the material because that's the whole point of it for them, to sell you all the stuff whilst you're watching free content.
Last weekend it was Kevin Kubota doing OCF stuff, he wasn't that interesting to watch TBH.
This weekend it's album design but over the next few weeks you have Doug Gordon and Lara Jade.