There's no "video discussion" or "meta discussion" forum so I picked this one. Hope it's not too off-topic.
There's a soft, but distracting (to me) background static/clicking sound in the videos. I checked with a few different devices/headphone combinations and compared to some other Youtube videos to confirm this.
I've only watched the archive videos; I haven't compared to the live stream so I don't know if it's related to the mic/capture or to the youtube transcoding.
Casey, what kind of mic are you using?