Here is a concise summary of the provided transcript:
**Title:** A Film Theory on Attack on Titan
**Main Question:** What are the Titans in Attack on Titan made of, and where do they come from?
**Theory:** The Titans are not just humans transformed, but are also composed of a unique, yeast-like organism that:
1. **Allows for rapid size increase without proportional weight gain** (comparable to bread rising)
2. **Produces heat** (especially in larger Titans, causing steam and combustion)
3. **Requires sunlight for energy** (similar to yeast's increased activity with UV radiation)
4. **Releases gas (CO2) upon decomposition** (explaining the explosive release of gas when Titans die)
**Evidence:** A special, lump-like yeast mentioned in the manga's bonus sections, which has preservation properties similar to those observed in Titan bodies (preventing aging and decay).
**Conclusion:** The Titans' mysterious composition and behavior can be explained by the presence of this unique, giant-sized yeast, which is hinted at in the Attack on Titan universe.
Here are the extracted key facts, each with a number and kept as short sentences, excluding opinions:
**About the Video/Document**
1. The video discusses the anime "Attack on Titan" as part of a "Film Theory" series.
2. The video has a spoiler warning for "Attack on Titan".
**About Attack on Titan (Setting and Plot)**
3. In the series, humanity has lived in fear for 100 years, protected by towering stone walls from man-eating giants known as Titans.
4. The main character, Eren Jeager, can transform into a Titan at will.
5. Eren's power gives humanity a fighting chance against the Titans.
**Titan Characteristics**
6. Titans range in height from 4 meters to 15 meters (approximately 13 to 50 feet), excluding Abnormal Titans.
7. Titans have bone structures similar to humans.
8. Despite their size, Titans can move quickly and with precision, unlike what would be expected due to the square-cube law.
9. Titans are lighter than they appear, with severed limbs weighing next to nothing.
10. Titans give off an insane amount of heat, with larger ones producing more heat.
11. When wounded or dying, Titans release massive amounts of gas.
**Energy Source and Behavior**
12. Titans do not need to eat humans for sustenance.
13. The only energy source Titans need to move is sunlight.
14. Depriving Titans of sunlight causes them to stop moving.
**Yeast Connection (In-Universe Evidence)**
15. A unique type of yeast is produced behind Wall Sina in the Attack on Titan universe.
16. This special yeast has a form unlike regular yeast, resembling a lump of fermented soybeans the size of a human head.
17. It has preservation properties that can transform and preserve food in ways not explained by science.
18. This yeast is mentioned in a limited number of bonus pages in the manga, which typically provide relevant storyline or world-building details.
**In-Universe Titan Preservation**
19. Titan bodies seem to preserve their human hosts from aging or decaying for years while transformed.