Episode 72 starts at the gatehouse of Basket Castle, and some work has happened off camera since last time. A section that sat a bit higher has been leveled, and a whole new length of wall is up, inner and outer faces both, running all the way down to the bottom of the slope. Basket is the only player in the game this time.
Where the crane goes
Right about here is where the crane will sit, lifting goods up from a road that will someday run below, so nobody has to bring them through the front door. It needs a structure built into the wall, and Basket can't decide whether that should sit on the cliff edge or stick out two blocks and reach all the way down. "So I'll have to think about that." A stables might go inside, against this wall.
Curve, diagonal or square
One stretch of inner wall bends in a gentle curve, and Basket isn't happy with it. It isn't curved enough to read as a curve: "it just seems weird." The options are a straight diagonal to match the other side, or squaring the corner off. Basket mocks up the squared-off version and runs over to compare it with the diagonal. A viewer thinks the square doesn't look as weird as expected, and Basket makes the call: "We'll go with this plan."
A taller first floor
Each barracks floor is three blocks high. Basket clears out the lower area to work on the bottom of the building and counts it across: 22 blocks, walls included. A strip at one end stays open for secrets later. Somewhere nearby there might be a galley, until a viewer points out that a galley only exists on a ship. Mess hall, then.
Then Basket decides the first floor can be taller than three ("I could go just crazy and just do five"). That floor might hold the mess hall and other facilities, with bunks higher up. How the stairs reach it isn't worked out yet. Dirt goes down so grass can spread, ready for path blocks later. A cubby gets left open for a secret door, and the main doorway will get real double doors.
Room in the walls for secrets
Upstairs there's an awkward gap beside the stairs. Basket moves a wall out one block, which leaves a one-wide space inside the wall. "That's one of my favorite parts about everything I build is secret doors and redstone." There won't be much redstone in these, since contraptions take up a lot of room. Maybe just "a painting, walk through the painting."
Another wall gets pushed out the same way so there's an empty space between two walls for a passage. Cracked bricks go in as the outer face goes up ("This might be too much cracked stuff"), and Basket digs one open spot all the way down so it's easy to plan around later. A false wall closes it in.
Stairs and windows
Stairs and slabs go in between the floors, with torches to light the way, and "now we can actually get up and down between these floors." A window on the upper level gets a spot on each side kept open, in case a button and piston door goes there someday.
From outside, though, the plain window doesn't look right. Basket tries stone brick stairs around the opening, then iron bars, then flips which side gets which. "That looks better." Where the stairs don't get in the way, each floor can have one of these windows in the middle.
The next building over
In the last few minutes Basket starts the building next to the barracks, against the wall. An opening leads through to the next area, and the gap for the doorway comes out to "an even number for my double doors. Awesome." Arrow slits go on the inside, because "a little bit of defensive stuff in the inside doesn't hurt." Torches go in too. The credits run to the end with no gameplay after them.