A possible concise summary is:
Lizzy gets trapped in a box fort cage that she and her friends made to catch a pond monster. She spends the night in the cage and sees some movement in the water. She tries to get help from her dog Millie, but fails. She is hungry and scared, but eventually gets rescued by Stephen. They still don't know what the pond monster is.
Here are some possible facts extracted from the text:
1. The text is a transcript of a YouTube video by Lizzy Sharer, who is part of the Sharer family that makes vlogs and challenges.
2. Lizzy got trapped in a box fort cage that was meant to capture a monster in the pond near their house.
3. Lizzy spent the night in the cage and saw some movement in the water that she thought was the monster.
4. Lizzy tried to get help from her dog Millie, but Millie did not understand her.
5. Lizzy was hungry and tried to eat some koi food, but it tasted bad.
6. Lizzy was eventually rescued by her brother Stephen, who came to check on the trap.
7. Lizzy and Stephen saw something glowing in the pond at the end of the video.