Since recording this video, a friend found out what it had been and provided a link, which I’ll include below.
I found this as I explored the Malletts Bay Cemetery in Malletts Bay, Vermont. This had been an old barn that had been destroyed by fire.
After I finished filming, I walked around and snapped a few more photos.
Of course, if I had visited that cemetery when it was warmer, I never would have seen this structure. Leaves obscure a multitude of things.