Youtuber's are crazy
Every one in the world is watching youtube. If you try to find a person that doesn't know wat youtube is it is nearly impossible. On the other hand the creators are gaining millions of subscribers and views and every content creator wants views so bad that they can just do anything.
Youtubers are doing such dangerous stunts its like jumping in a volcano. They are going so mad that they do such challenges like not eating food for 30 days or ziplining over a volcano.
The main reason of doing so is to get money. According to youtube monetization policy that the creator should have 1000 subscribers and 4000 watch hours that's why they are on the platform.