What if people lived under water | It is possible to breath and make cities under water?

Let's imagine that humanity lives under water. Around the solid ocean and there is no islands. How would we look like in this case? What would our lifestyle be like? Would we have to evolve to pull this off? Answers to these questions you could find wathching this video to the end!
Now, only 15% of life on Earth lives in Oceans. Today, we’re gonna crank that up a notch. You, as well as all life on Earth, are moving underwater.
The hypothesis that we have suggested here is based on examples of earthly evolution.
#underwaterworld #liveunderwater #whatif