A possible concise summary is:
The video is about a girl named Luluca who shows what's left of her school supplies in her backpack. She talks about her tests, her elegant mails, her art works, her pencil case and her notebooks. She also finds some things that she had lost or forgotten in her backpack. She invites the viewers to watch her last day of school video and ends with a kiss.
Here are the key facts extracted from the text:
1. The text is a transcript of a video where a girl named Luluca shows what's in her school backpack and pencil case.
2. Luluca is already on vacation and only has three days of tests left.
3. Luluca has a backpack that she got from her mother after spilling grape juice on her previous one.
4. Luluca has several items in her backpack, such as notebooks, tests, elegant mails, stickers, candy, a phone, a car, and a hair brush.
5. Luluca has a smart notebook that she can reuse by replacing the refill.
6. Luluca has a pencil case with a multiplication table, a protractor, a square, pencils, erasers, scissors, and other things.
7. Luluca lost her black pencil and her mechanical pencil cap.
8. Luluca likes to listen to music and do art activities.
9. Luluca received some elegant mails from her friends and admirers.
10. Luluca asks the viewers to activate the bell to watch her last day of school video.