Yes, I know I am late to the party but Twitch RPG feeds are great and I'm quite addicted.
My favourite is Pubfinders, who stream Icar. https://www.twitch.tv/pubfinders
Sadly, their feed goes out at about 11pm in the UK so I've only caught them live once.
When you watch someone on telly, it is easy to become attached to them. Even though they don't know you, you begin to grow an attachment. When people aren't acting but being themselves (like they are around a table) then draw is more powerful. On Twitch, the people you are watching are responding live, so the draw is stronger.
I don't know the Pubfinders at all but I've watched them for hours now. I feel like I know them. I don't, I know the recording of them. And that's a bit weird, isn't it? It's not just me, is it?