1. Create a level sequence first, and select the location to save
2. Put the created level sequence into the scene
It doesn't matter where the location is
3. Add a movie camera to the scene
4. Add a track to the movie camera
step1: First select the Movie Camera component in the World Outline, as shown in the red box on the right as shown in the figure below
step2: Click Add Track and select Movie Camera
5. Add keyframes
step1: Move the thing in the red frame to a different position 
step2: change the position of the movie camera in the scene at this time, and click the + sign in the figure below
to record the position of the camera at this frame position 
Repeat step1 and step2 Just design a movement trajectory for the camera
6. Camera cut track
step1: add camera cut track
step2: bind camera
7. play
Choose the appropriate time in the blueprint to play the cutscene.
For example, play it at the beginning of the scene. The blueprint is as follows:
In this way, the cutscene you set will be played at the beginning of the scene.