I Found the BEST Seed for Speedrun Practice

You spawn in a village with a blacksmith and a ruined portal, which give every material you need to go to the nether.

Then it goes way crazier. When you went through the portal, you spawn in a bastion which is also collided with a fortress.

You can practice most of the assets of speedrunning easily.

Version: Java 1.16.1
Seed: 1049259713839912061