A possible concise summary is:
The speaker analyzes the survival options for the human population in the anime Attack on Titan, where they are threatened by man-eating giants. He uses math and geography to show that staying inside the walls is safer and more sustainable than fighting the titans outside. He also promotes a website that offers anime streaming and recommends some shows to watch.
Here are some possible facts extracted from the text:
1. Scientists in South Korea have managed to sustain a nuclear fusion reaction running at temperatures in excess of 100 million°C for 30 seconds for the first time.
2. The core of the Sun has a temperature of 15 million degrees kelvins.
3. The walls in Attack on Titan are too strong for the Titans to tear apart, except for the segments with the gateways.
4. The human population within the walls at the start of the series is about 990,100 people.
5. The area within wall Sina alone is 196,000 square kilometers, which is larger than over half the countries in the world.
6. The minimum amount of agricultural land necessary for sustainable food security is half of a hectare per person per year.
7. Populations tend to grow at about 1.1 percent per year.
8. Crunchyroll offers the largest and most diverse collection of anime out there, including Attack on Titan and Full Metal Alchemist Brotherhood.
9. Some of the proceeds of each Premium Membership on Crunchyroll go back to the original creators of the anime.