The video is calming and, as Luck has mentioned, peaceful. But how is it connected with the theme "balance"? In order to understand this one should define the very notion "balance". The best synonyms for this word are "equilibrium" and "harmony". Didn't the video make you feel the harmony of underwater life? Sure it did)))
It is such a peaceful video)) It reflects that balance-issue very well. Everything in our world is balanced starting with nature and finishing with human-beings. And any try to destroy this balance can lead only to bad consequences.