A possible summary is:
The video is a humorous retelling of the movie The Dark Knight, focusing on the conflict between Batman and the Joker. The narrator summarizes the main plot points, such as the Joker's bank robbery, his attempts to kill Batman and Harvey Dent, his capture and escape, his hostage situation with two boats, and his final confrontation with Batman. The narrator also makes jokes about the characters, such as Rachel's face change, Harvey's coin tosses, and Batman's voice. The video ends with a teaser for the next part of the saga and a request for likes and comments.
Here are some key facts extracted from the text:
1. A group of thieves with clown masks rob a bank that has mafia money and only one of them survives, the Joker.
2. Batman is hunting criminals and capturing Scarecrow, while also dealing with a group of vigilantes who imitate him.
3. Harvey Dent is the new district attorney who is honest, brave and efficient in catching gangsters. Batman and Gordon consider him the public figure that Gotham needs to restore order.
4. The Joker offers to kill Batman for half of the mafia's money, but they reject his offer and he kills some of them with a magic trick.
5. The Joker kills the commissioner, the judge and tries to kill Harvey Dent, but Batman saves him. He also announces that he will kill someone every day until Batman reveals his identity.
6. Harvey Dent reveals himself as Batman to protect the real one and is transferred to a maximum security prison. The Joker attacks the convoy and tries to kill him, but Batman stops him and Gordon reappears, revealing that he faked his death to catch the Joker.
7. The Joker escapes from prison with the help of some corrupt cops and kidnaps Harvey Dent and Rachel Dawes, putting them in different locations with explosives. Batman goes to save Rachel, but the Joker tricks him and he finds Harvey instead, who survives but burns half his face. Rachel dies in the explosion.
8. The Joker takes two ships full of hostages, one with convicts and one with civilians, and gives them each a detonator to blow up the other ship. He also threatens to explode a hospital if someone doesn't kill an accountant who knows Batman's identity.
9. Harvey Dent becomes Two-Face and seeks revenge on those he blames for Rachel's death, leaving their fate to a coin flip. He kidnaps Gordon's family and threatens to kill his son.
10. Batman uses a technology that allows him to use the city's cell phones to track down the Joker and fights him on a building. He spares his life and tells him that he won't kill him because he is too much fun.
11. Batman saves Gordon's son from Two-Face, but Harvey dies in the fall. Batman decides to take the blame for his crimes so that Gotham can keep its hope in him as a hero. Gordon destroys the Bat-signal and starts a hunt against Batman.