Unity ECS End Game - Implementing High-Performance Systems with Unity DOTS Job System 

This video is good because it shows you which command buffer to use and at what point.

Great tutorial, thank you. It would be great if in some future videos you will implement multi scene logic. Like menu/meta and gameplay scenes with proper way of starting/stopping ecs logic(world) in gameplay/menu scenes

Always good to get more dots information. I may change my game to have a 3d mode, you make it seem much easier to implement