Episode 32 of The Witness stays with the green panel that stopped the last video, the one with axes like a graph. Most of the video goes to comparing it with a windmill nearby. When that runs dry, Basket goes back to a door from early in the game, opens it, and finds a drawing the commentary thinks is the missing piece.
Studying the windmill
The video opens where the last one stopped, looking at the green panel. The commentary has a plan: "double check the windmill," because one sail "has a broken part." Up close there is more: "there's a couple ones that have cross beams but not all of them."
Inside, the panel in the floor sends power one way or the other. One way turns the sails; the other is a mystery: "I never figured out what it actually does." Stopping the windmill so it lines up with the graph is one idea. A walk past some drawings by the pink trees turns up nothing about windmills: "This is just about the brain and body stuff."
Guesses on the graph
The first guess is a line to the spot "right before the broken thing." It is wrong, and a wrong answer means going back to solve the vine panel again first: "I have to go back to here to solve this one."
Back at the windmill, the commentary counts the cross beams on each sail, "slot four," "two," "six," trying to match them to the marks on the panel. A viewer suggested combining all the arms. The commentary works through it: "what's missing is a little bit on the end." Three more lines go in, up, left and all the way down. None of them work. "You could technically brute force this one, but it would be a pain."
An old door
Basket moves on and heads over a hill to "a door over here" from "the beginning of the game." Its panel is a gray grid of black and white squares, and the rule, as the commentary puts it, is to "keep the dots not mixed together." The first starting points are ruled out one by one, and then the line goes all the way around. "I think I followed all the rules. Yes!"
The door opens on a dim room with a black post and a red slot, and the commentary backs off from it. Further in, a sheet of paper lies on a table, drawn with hexagons and a zigzag line along their edges. "It's a thing we need." The commentary thinks it is "potentially the answer to the other thing that I couldn't figure out before."
Where it ends
With the drawing in mind, Basket heads back through the village: "now let's go into the windmill because that is the answer for, I think, this thing in the windmill." The windmill comes into view, and the video ends before Basket gets there. The green graph panel is still unsolved.