This is a possible summary:
The video is about the crossover between the Justice League and the Avengers, two teams of superheroes from different comic book publishers. The video narrates the first part of the story, where the Grandmaster and Krona, two powerful cosmic beings, make a deal to play a game using the heroes as pawns. The game involves collecting 12 cosmic artifacts from both universes, and the winner will get the information that Krona seeks about the origin of the universe. The video describes the differences between the two teams and their worlds, and how they clash with each other in various locations. The video also shows some iconic scenes, such as Superman stopping Thor's hammer, Flash humiliating Quicksilver, and Krona beating Galactus. The video ends with a cliffhanger, where the Grandmaster uses the 12 artifacts to merge the two universes and erase everyone's memory. The video promises to continue the story in another video.
Here are the key facts extracted from the text:
1. The Justice League and the Avengers met in a crossover event.
2. The story begins with the Grandmaster, a Marvel character, surveying a newborn galaxy.
3. The Grandmaster encounters Krona, a DC Comics character, who is searching for information about the origin of the universe.
4. Krona was a scientist who became obsessed with discovering the secrets of the universe's origin.
5. Krona's ship exploded, killing his crew, and he was condemned to be thrown into eternity without a destination.
6. The Grandmaster proposes a game to Krona, where the Justice League and the Avengers will compete to gather 12 cosmic items.
7. The Justice League is transported to the Marvel universe, where they encounter various Marvel villains and heroes.
8. The Avengers also travel to the DC universe, where they are idolized by the population.
9. The two teams clash, and the game begins, with each side trying to gather the cosmic items.
10. Batman and Captain America team up to investigate the situation and eventually discover the Grandmaster's lair.
11. The Grandmaster's plan is to use the 12 artifacts to merge the two universes and erase everyone's memory.
12. The Justice League ultimately wins the game, but Krona refuses to accept defeat and attacks the Grandmaster.
13. Krona discovers that the being he seeks is Galactus and materializes him.
14. Galactus is summoned by Krona, who demands that he reveal his secrets.
15. The Grandmaster intervenes and uses the 12 artifacts to merge the two universes and erase everyone's memory.
16. The story is part of a larger saga that will be continued in future videos.