How to create this timelapse effect:

  1. Film a long sequence from the same angle. First with the subject then without.
  2. Speed it up. Cut out the sequence with the subject. Then speed up the rest of the sequence and change time interpolation to frame blending.
  3. Mask . mask out the subject and key frame the movement. Place the clip on top of the background sequence.
  4. Add some color correction and grading and it is done!