This is actually a common practice among businesses for their names. I can't say each youtuber has the same reason behind it but it's away of keeping your company safe. Say if you have a deep rooted named and any of your merchandise has it's name on it or equipment. Another company can trademark your name if it's not and collect royalties off of you or send a cease and desist order. When you get down to the business aspect of it, it can be a pain in the a**. But if you become a brand at some point I would suggest trading marking your name as well.
I'm not familiar with "Damn Daniel" so I'm not sure what's going on in the back ground. If it's just or not, I was mainly just providing the logic behind it being a business owner. So I'm not sure if it's like that outrageous fine brother's trademark of "React" but "Damn Daniel" seems pretty niche just by it's name.[DOUBLEPOST=1457087115,1457086688][/DOUBLEPOST]oh wait, I remember this now. This was those two guys who made a video, and there was a third party that trademarked the term after It went viral. They actually might be able to fight that in court considering the timing but that's actually dependent on a few factors.Yeah, but this is more, in this case, being a copyright/trademark troll given that this is the main reason why so many videos about Damn Daniel are being copyright claimed.