Obviously you don’t want to break the law in any way when you are riding your motorcycle so it is important to be clear about where the law stands on motorcycle helmet cameras. Unfortunately, this is not that easy to find out. When you search online, you will find a range of opinions on the legality of helmet cameras and there are some lively debates on the subject on forums etc.
There is no specific law in the US that states that motorcycle helmet cameras are illegal. However, there are laws that prohibit the modification of motorcycle helmets. This is for safety reasons and is an entirely sensible approach. Any modification that breaches the ability of the cycle helmet to protect the rider’s head in a collision is obviously a bad idea.
Therefore, it is easy to see that drilling holes in your helmet so that a camera can be mounted would be unwise and probably illegal. On the other hand, most mounting mechanisms for cameras are adhesive-based and therefore do not interfere with the integrity of the helmet. This means that your safety is protected and you are probably staying on the right side of the law. If you have any doubts, it is sensible to check with the road safety enforcement agencies in your area.