In this chapter, I’ll show you how to use the sandbox as a player to create specific animations directly in the game environment. Then, I’ll show you how to retarget these animations for metahumans and use them in your cinematics… or in your games.
https://dev.epicgames.com/community/learning/tutorials/9XPz/unreal-engine-ue-5-6-advanced-cinematics-chapter-1-sandbox-to-cinematics