No one knows the specifics of when AGTube came to be, however some of the earliest traces date back to 2007. Many AGTubers consider xxMollyGirlxx as the first AGTuber, but it is not certain that this is the case. Many of the most popular agtubers today were inspired by older AGTubers. These AGTubers may or may not still be around. Most AGTube inspirations are from "Old AGTube," which is an era of AGTube from around 2009-2013. In Old AGTube, stopmotions were not the only video format. Live videos were more common than they are now.
AGtubers consist of people of all ages, and is not even limited to girls only. Being a part of the AGTube community allows you to make videos with any American Girl doll you wish and upload them to YouTube.
AGTubers are known to post a variety of videos ranging from how to's to opening videos to stopmotions. When AGTube first started, live videos were most common. Nowadays, AGTubers will post mainly stopmotions or how-to type videos.
The AGTube community is generally very positive and supportive. AGTubers will often like and comment on each other's videos. The only con is that many AGTubers leave when they find a different interest.