Great explainer on what advanced civilizations might be like

Humanity is slowly moving up the Kardashev scale, designed and refined to rank just how advanced a civilization could get. As Kurzgesagt shows, it starts to get almost unimaginable for lowly humans as things proceed.
It's part of their series on intelligence
The observable universe is a big place that has been around for more than 13 billion years. Up to two trillion galaxies made up of something like 20,000 billion billion stars surround our home galaxy. In the milky way alone scientists assume there are some 40 billion earth like planets in the habitable zone of their stars. When we look at these numbers it is hard to imagine that there is nobody else out there.
If you liked that, the Aperture video is a good summary of other YouTube videos on the subject:

Image: YouTube / Kurzgesagt