samrat
Are there pre-stream discussions everyday?
Some days do, some days don't. If you're going through each video it's a bit hit and miss. Sometimes there's a few questions, sometimes there's pretty good discussion and and sometimes there's an hour of silence. It's a relaxed thing which can be pretty much anything. Because the videos only last for the few weeks, cataloging them all would be semi-pointless. All actual material is being uploaded (the Emacs shortcuts stream for example). If you're really interested in knowing everything that has happened but can't actually get to the pre-stream, I'd say the best bet is to ask on twitch chat if there was anything interesting on that day.