The video features four YouTubers, Big Josh, Vikkstar, Toby, and Harry, who attempt to solve seven riddles to test their brain power. The riddles include identifying a mistake in two photographs, counting the number of holes in a t-shirt, naming a tree with a camouflaged bird, spotting a mistake in a sequence of numbers, finding a hidden baby in a tree, determining which line is longer, and spotting a character named Mike Wazowski in a crowded image. Throughout the video, the group members discuss their thought processes and reactions to the riddles. After completing the riddles, the video explains that the results can be used to estimate the viewer's brain age, with faster completion times indicating a younger brain. The video concludes with the group members joking and promoting their channel.
Here are the key facts extracted from the text:
1. The video features seven riddles to test the viewers' brain power.
2. The brain gets less sharp and productive with age.
3. Some people can turn their tongues upside down.
4. The sensation on the tongue is sensed from the opposite side when it is turned upside down.
5. Evolution did not teach the brain to read sensations on the tongue in that position.
6. In a t-shirt, there are eight holes: neckline, bottom of the t-shirt, and four holes in the middle (two in the front and two in the back).
7. The question "How would you name this tree?" is a trick question, and the answer is not related to the tree itself, but rather to the camouflaged bird on the tree.
8. In the "Spot the mistake" task, the mistake is that the word "spot" appears twice.
9. In the "Hidden baby" task, the baby is hidden in the fetal position in the branches of the tree.
10. In the "Which line is longer?" task, the answer is not always obvious, and some people may be influenced by others to give the wrong answer.
11. A research on conformity found that people may give the wrong answer to a simple question if they are influenced by others.
12. If you answer each question correctly in less than 20 seconds, your brain is considered young and flexible.
13. If you answer each question correctly in less than 5 seconds, your brain is considered very young and flexible.
14. The video uses a stock image to describe someone very young and flexible.