In this tutorial, I provide a clear and objective overview of the main concepts that make up Sequencer, from the fundamentals of the Timeline and Tracks to the use of cinematic cameras, animation, and audio. The content was designed especially for those who are just starting out or who want to solidify their foundation before moving on to more complex projects—including short films, trailers, previs, and in-game scenes.
https://dev.epicgames.com/community/learning/tutorials/jOPM4/unreal-engine-introduction-to-sequencer