I left my camcorder faced up at the sky and filmed clouds moving for about an hour. I used the original film and audio for track one. I then made a copy of this and separated the audio from the visuals as I wanted to speed up the visuals and stretch out the sounds for track two. I used the cookie cutter tool in the first track to create the circle grid effect and placed the other track below so that it could be viewed through the grid. The original film of the clouds can be seen moving on the actual pattern of the grid. The original sound consisted of the natural background sound, you can hear, cars, people walking, seagulls, and the sound of the wind etc. The stretched sound has quite a warped effect. The changing lighting is not an effect, it's just the moving clouds blocking out the sun :-)
For the second experiment below I used the same method but only added in another layer of video and set it to a different speed (more or less in the middle of the other two). I then cookie cut squares inside the circles to create three different timings of the same visuals, and left the same two different timings of the sounds.