A possible concise summary is:
The text is a transcript of a video that tells the story of Jiang Liu Er, a young man who seeks revenge for his family's murder by a demon named Zhao Wu Yi. Along the way, he meets Cai Ying, a demon hunter who claims to be his fiancee, and learns about his past and destiny. He also encounters Tian Yun, a sorcerer who tries to help him kill Zhao Wu Yi, but fails. Jiang Liu Er eventually decides to join Tianguang Temple, a Buddhist sect that teaches him sorcery and compassion. He confronts Zhao Wu Yi and tries to persuade him to let go of his obsession with Fu, his dead lover. The video ends with Jiang Liu Er leaving for Tianzhu, a foreign land, to learn more about Buddhism and sorcery.
Here are the key facts extracted from the text:
1. Su Yu was a pharmacist who refined a magic elixir that can preserve the dead's bone and turn into human flesh, but also turn people into demons if they have resentment in their heart.
2. Cheng Zheng, the master of Chilian Gate, killed Su Yu to get the elixir, and also poisoned Su Yu's friend Fu and captured Zhao Wu Yi alive.
3. Zhao Wu Yi swallowed the elixir out of rage and became a demon who carried a coffin and killed Cheng Zheng and his family.
4. Cheng Zheng's son Jiang Liu Er survived and was taken to Tianguang Temple by Master Ming Song, who sealed his memory to ease his pain.
5. Cai Ying, a demon hunter and Jiang Liu Er's childhood friend, tried to help him remember his past and learn sorcery to take revenge on Zhao Wu Yi.
6. Tian Yun, another demon hunter and Cai Ying's cousin, was defeated by Zhao Wu Yi and lost his confidence until Cai Ying encouraged him to join her.
7. Zhi Shou, a senior monk from Tianguang Temple, followed Jiang Liu Er and Cai Ying to stop Zhao Wu Yi, but was killed by him.
8. Jiang Liu Er confronted Zhao Wu Yi and learned that he was Cheng Zheng's son and the cause of Fu's death.
9. Jiang Liu Er decided to end the grudge with Zhao Wu Yi by killing him and himself, but was stopped by Master Ming Song and Cai Ying.
10. Jiang Liu Er became a monk and went to Tianzhu to learn Buddhism and sorcery, while Cai Ying stayed at Tianguang Temple to take care of the demons he caught.