Quote from 2d-chrisI suppose you could give actual advise into level design, not the art part, which I don;t do that much of today anyway. I could quite easily in a few hours go over how to design say, a crysis 3 or 2 single player mission and start to block some initial ideas out, pacings, where to leave off before art comes into the mix etc.
This was more of what I was thinking. As the stream is going the person usually gives a lot of commentary on what/how they are doing certain things. It often becomes Train of Thought, as they just say what they are thinking in their head. "This looks too big" "Maybe this hallways should look..." "This texture is being a jerk". Also, if it is a stream on something like twitch.tv it can be interactive where viewers can ask questions, or the streamer can get feedback/suggestions.
Just an idea. And if someone wants to do it for free, that's even better.