A possible concise summary is:
The speaker introduces the topic of social constructs, which are properties that we project onto the world for some purpose, and how they relate to metaphysics, the study of existence. They use examples from different imaginary worlds to illustrate how social constructs can vary depending on the context and the game we are trying to play. They also acknowledge the political and ethical implications of social constructs, especially for categories like sex, race and gender. They end with a musical performance.
Here are the key facts extracted from the text:
1. The text is a transcript of a video about social constructs and metaphysics by Philosophy Tube.
2. The text uses examples of different Earths, baseball, platypuses, and coolness to illustrate the concept of social constructs.
3. The text argues that social constructs are properties that communities confer on objects or people to track some underlying properties that serve a purpose in a game or activity.
4. The text acknowledges that social constructs are not fixed and can change depending on the context and the interests of the people involved.
5. The text suggests that social constructs have implications for justice and politics, especially for categories like sex, race, and gender.
6. The text ends with a song performed by Philosophy Tube.