Now I could be wrong, because I am watching this in the background while playing Minecraft but I could swear I’ve Heard a few things come up more than once more than twice, To confirm my suspicion I re-watched the video and have found out that there are multiple things that were repeated to even three times at the beginning then the middle and the end this could always just be me, but I feel like the debug stick for example, did not need to be mentioned three times word for word, the exact same description for it
The fact that I already knew of a few of these secrets says something. The top things I knew: the boats on lava, the powered snow base, the coal block being better than nine pieces of coal, the campfire being OP at cooking food, sword + bamboo = OP dropper, etc.
There are also swamp villagers that were Lillypad hats and get them the same way you get jungle villagers, just in a swamp, biome, swamps and mangrove swamps either one works
that thing that you said about the nether will be like the end the 1.21 update is the an End update (and the skulk update) and there might be new end biomes and new end mobs and not just the boring ender men and shulkers