While on the whole, you tube is a good site, I came across some videos that hint at killing people on certain trap devices. My son has been accessing these sites. Look at "bear trap"
Most impressive and important site that gave me information and review on topic that I ever needed. But could not rely on it always. Because there are people always uploading and editing.
Youtube is not obeying their TOS. A lot of adult videos are available on youtube. Soory to say that youtube is becoming a porn site drastically............