Many people imagine that only those who have a successful YouTube channel can be referred to as YouTubers. But regardless of how many subscribers you follow on your channel, if you produce video content on this network, you are already considered a YouTuber. It doesn't matter if you've created a channel to promote your brand, to talk about everyday topics, or to broadcast educational material. Just posting your videos on YouTube already makes you a YouTuber.
What sets you apart from people like Pew Die Pie and channels like Dude Perfect is the number of followers and their commitment to those channels, which makes them better known than you.