Actually, you should reconsider your thinking. This is how companies improve their product's security (whether it be software or consumer electronics). These are the same type of people that often find themselves working as a security-experts, tasked with uncovering security vulnerabilities.
It is a common misconception that people who engage in these activities and publish their results are supporting criminal activity. Indeed, it is likely that some of these people indeed have malicious intent, but I would argue the vast majority of them simply enjoy it as a problem-solving exercise and by posting these tutorials on YouTube they are actually doing a great service for the community, by allowing the responsible party to start patching these issues more quickly.