I will reveal the entire process of creating this cinematic using only Unreal Engine by opening up the actual project file I worked on.
I have broken down the end-to-end solo production pipeline—from gathering references to rendering and editing—into eight steps.
There is no need for manual modeling or creating animations from scratch.
You simply gather and mix your assets, then weave them together into a story.
https://dev.epicgames.com/community/learning/tutorials/mmDk/unreal-engine-master-the-unreal-cinematic-workflow-with-this-one-video