As promised, here is the video of what it looks like below the ice. I found the sounds to be fascinating, as well as the amount of light visible. It wasn't even a sunny day when Greg took this video. It was the same day as when he worked on the pressure ridge. To that end, you can still see drops of water on the lens!
I also thought it was pretty cool to see rocks frozen to the underside of the ice sheet. In the days since the pressure ridge appeared, it has actually "flattened" out a little, at least in front of our property. If I knew more about plate tectonics, I might better understand what is going on. What I really am wondering is if the sauna hole moves around with these changes? If someday I get a GPS, perhaps I'll be able to verify that.