Make some time January 7, 8 and 9

Are these downloaded anywhere or do you have to watch them at a certain time.

I was wondering this as well since my work schedule usually keeps me from watching these, but today they specifically mentioned that after this live Expo, you will be able to go back and view it again when you want, as many times as you want.
I don't yet know if we can sign up and view other/older videos that I did not sign up for. But I hope so. I would like to see the last one yellowrose posted as well. And any others I can.