"There are over 100 billion galaxies." I'm thinking, if there are all these in just this tiny section of space
Quote correctly, or quote not. Here is a transcipt I hope is correct
There where about 3K galaxies in the area studied [...] the light from over three thousand galaxies had covered the detector [...] Every single spot, smear and dot was an entire galaxy, and each one containing hundreds of billions of stars.
Apart from a galaxy typically containing 100 billion starts, I believe that roughly 100 billion galaxies is the estimate of the total number of galaxies in the universe.
Since, it seems, you where the one first touching on one of the nowadays forbidden subjects I dare continue - notice how the first comment on that YouTube page is this quote:
C. Sagan wrote:
Our posturings, our imagined self-importance, the delusion that we have some privileged position in the Universe, are challenged by this point of pale light. Our planet is a lonely speck in the great enveloping cosmic dark. In our obscurity, in all this vastness, there is no hint that help will come from elsewhere to save us from ourselves.