Moving Image: Collecting footage in different light settings

I am continuously collecting footage for my final moving image piece. I have collected footage in different light settings.
This clip was taken in the middle os the day on a bright day so the sun created bright highlights and dark shadows on my face:
https://www.youtube.com/watch?v=uoXnuc8gIuE

The next 2 are examples of over exposed and under exposed, respectively:
https://www.youtube.com/watch?v=d3fiPXEV9ew
https://www.youtube.com/watch?v=rFbDWxAabdw
 I have also included walking in the above 2 as I do not want all of my clips to be stationary. I see it as adding 'texture' to the film as a whole.

The next clip is taken in a diffused light setting. Everything appears softer:
https://www.youtube.com/watch?v=DwzGAylPHaE

This clip is taken is diffused lighting again, but lighter than the previous. It is a contrast to the sunny day clip as it is still well lit, however there is no variation in tones or shadows:
https://www.youtube.com/watch?v=zH7FNbKI9Hc

I am keeping with the second a day clip idea, however my clips will be of varying lengths. This way I will be able to tell the story more successfully than in 1 second clips.
I have been thinking about sound for my film also and I am debating whether I should use sound or just have it silent. I could have it somewhat silent and attach a background noise of perhaps feedback on a tv or no signal on a radio; the muffled, grainy noise it produces.