Genny tweeted the actual seed a few days ago: 1632424521
I checked the seed just before posting this to make sure he wasn't just trolling us all, and it IS the actual seed. Keep in mind tho that some time has passed and the modpack has been updated a few times since they launched the server so some things will generate differently, like villages will have a different layout, spawners may have moved around and stuff like that. but the general layout of biomes and shape of the terrain should be pretty much the same as what you see on youtube.
JB out!
