The death counter reads Basket 46, Scoti 36 at the start. By the end it's 47 and 37, one each, and the second half of the episode is a run of wither skeletons, spawners and a lab full of things they can finally use.
Down the tower
They start at a tower with a button and a sign nobody can read without OptiFine. "I do not." The guess is a teleport button. Nobody has a water bucket, only lava, and one of them doesn't have feather falling boots. They jump down anyway and close the door behind them.
Then the chat says "Darkness engulfs you" and things get strange. Stepping on the pad in the floor sends you somewhere else. The sign turns out to say "Use this button if you are not auto teleported." So the pad is the way back, and the other side is the real level: the Sand Resource Warping Zone Outpost.
Zombie flesh for dinner
From up high they can see sugar cane farms, some buildings and "spooky trees." One of them asks for food and gets offered two zombie flesh. "I thought we were in this together."
The path runs past poisonous spiders. One of them jumps down with the gold pickaxe and comes back saying the spider spawner they'd spotted is gone. Health drops to half a heart. "We need better armor, man." They could make iron armor, but with no enchanting table there's no way to enchant it.
One death each
The mobs keep coming from far away, and there are a lot of skeletons around one corner. About ten minutes in, Scoti is slain by a zombie. "How was I supposed to pillar, dude?" The death chest has no food in it either. "I thought I filled them up. Well, guess what? I didn't."
Around 12:50 Basket goes down too, slain by a spider while bridging. After that the plan is more bridging and pillaring and less running through the room they keep running through. Blocks run out, so blocks get thrown across.
Withered
Across the way is a skeleton spawner, and then something hits harder than a skeleton should. "A wither skeleton just came over and hit me." They wall off a staircase, the skeleton spawner gets broken ("It's dead to me"), and one of them figures they've "died like eight times in the last two episodes." Late in the fight Scoti calls out, "You saved me, Basket."
There's a wither skeleton spawner inside the sugar cane building, and that one goes too. "I would rather earn my XP the hard way than risk having those things break out on us."
We can make potions
Then: "Oh, nether wart! Oh my god, we can make potions." There's a Netherwart Farm sign and a wall of dispensers labeled Essence of Squid, Potion of Instinct, Sliced Ham, Bone Fragments and Antifire Potion.
A ladder marked roof access leads up to blazes and zombies breaking through doors. A lava bucket gets lost. Another room is full of witches, and there's still no sign of the fleecy box.
"Hey guys, you beat the game," one of them jokes. They don't know what potions they'll make, but they can make them. A wither skeleton waits behind them on the way out, inside the room, so it can wait until next time.