This is not a normal time lapse (where usually all the frames are separated by the same amount of time). It is an accelerated time lapse. Each playback speed was given 17 frames before passing to the next speed. If you want to check the speed, you can focus on how fast the moon is moving or how fast the clock of the train station is moving. You will see that at the end, the clock turned almost a full hour in less than one sec. of footage making the playback speed around 2000 times while in the beginning it was much slower.
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