To import a whole cutscene from a 3D package, follow these steps:

1. Create the cutscene in a 3D package. Remember that all the objects' animations should have the same length. They should have keys on the first and last frame.
2. If you plan to use Humanoid rigs, save every character as a separate file before importing it to Unity.
3. Import the cutscene to Unity (and all the characters, if needed). All objects that use Generic rigs can be exported together as one file. In such cases, a Generic rig will be created for the whole cutscene.
4. If you are using Blender and want to export the cutscene to FBX format, use the 6.1 version and make sure to check the Default Take option.
5. Go to the Animation tab in Import Settings.
6. The Default Take holds the whole cutscene animation. You may see additional clips in the Animation tab (especially if you are using skeletal animation). Don't use them. You can remove them from the Import Settings and change the Default Take clip name to something more descriptive.
7. If you are using Humanoid rigs for the characters, import them one by one from the separate files.
8. Create an Animator Controller for the cutscene and one for every character (if you are using the Humanoid rig).
9. Place the cutscene animation in the controllers.
10. Place all the objects in the same place on the scene.
11. If you want to animate cameras, create one camera for every shot of your cutscene.
12. Parent the cameras to the animated camera holder objects from the cutscene. You may need to adjust camera rotations.
13. Our cameras are children of the camera holder objects (and the cutscene object). But the animation is imported and read-only. So, we cannot change the cameras the same way we did in the Changing cameras with animation recipe. We need a script on the root object of the cutscene (the one with the Animator component). Create a new script and call it CutsceneCameraChanger.cs. In this script, we have a list of all the cutscene cameras and a public void ChangeCamera() animation event that changes the camera based on the given int newCameraIndex parameter. It disables all other cameras from the list:

        public void ChangeCamera (int newCameraIndex) 
       { 
 
            for (int i = 0; i < cutsceneCameras.Length; i++) 
            { 
                cutsceneCameras[i].gameObject. 
                           SetActive(false); 
            } 
               cutsceneCameras[newCameraIndex].gameObject. 
                           SetActive(true); 
        } 

14. Assign the script to the root object of the cutscene.
15. Open the Animation Import Settings for the cutscene.
16. Adjust the timeline to the place you want to change the shot.
17. Add Animation Events to enable appropriate cameras and change the shots. Use the int parameter to provide the newCameraIndex for the ChangeCamera function. Remember to set the Depth parameters of the cameras to be higher than the gameplay camera.
18. Apply the Animation Import Settings and disable the Mesh Renderer components for each of the camera holder objects so that they will not be visible in-game.
19. Play the game to see the effect.