A possible concise summary is:
The speaker reads out some secrets that people have submitted online about their school experiences. Some of the secrets are funny, some are disturbing, and some are shocking. The speaker reacts to the secrets with humor, disbelief, or advice. The speaker also checks how many people have misspelled the word "school" in their submissions. The speaker ends the video by thanking the viewers and asking for more word suggestions.
Here are the key facts extracted from the text:
1. A Korean nuclear fusion reactor achieved 100 million°C for 30 seconds.
2. The temperature achieved is nearly seven times hotter than the core of the Sun.
3. The core of the Sun has a temperature of close to 15.7 million Kelvin.
4. The surface temperature of the Sun is approximately 5800 K.
5. The experiment in South Korea is considered a move from physics to engineering in nuclear fusion.
6. A net energy gain was achieved in the nuclear fusion experiment.
Please note that these are factual statements based on the information provided in the search results and do not include any opinions or subjective commentary.