Great episode.
One thing I don't quite understand is, what happens when you bind a spirit? As in, why do it? Is it as simple as "if you bind spirit x you get y"?
I'll probably give some of his materials a read, though can't say I liked his style of "you'll just have to believe me... Oh and I can't really tell you how to do any of it".
But that said, thoroughly enjoyed the episode. Love these magic topics.
My understanding of binding is that it just helps the connection stay strong for the duration of a conjuring. Imagine that a telephone worked in a way that you dial someone up (summon) and then when they answer the phone you had to push a button to keep them on the line or it would fade off (bind) and then after you secure the connection, commune with the spirit, and make your requests, you then make sure to fully complete the conversation, tell them they are free to get off the call, and completely sever the connection. (release/license to depart)
I think that's a good way to think of the conjuring process so that it makes sense. I've tried one real conjuring, of a treasure hunting spirit named Birto. It was part of Gordon's Grimoire course. Nothing much happened, but I also didn't follow the rules to a T because of limitations of a less than perfect environment.
Personally, I would urge people to start more with sigil magic b/c it seems less risky, less taxing, and applies directly to improving your life. When you see results from it, you'll know there's something to it.