Thepersonfromearth

 thepersonfromearth was a YouTube channel, existing between 2008/2009 and 2013, not very much is known about it besides things about their (now deleted) videos that they created. The channel had 112 subscribers a few months before being deleted in late 2013. It is currently unknown why they deleted their channel.

Speculated story
It is thought that this person probably got into astronomy like a lot of us did. The name "thepersonfromearth" indicates was already into astronomy by the time they created their channel. It was around 2008-2009 that star size comparisons became big on YouTube, so they made their own. They decided to make a second version inspired by some of the newer ones that went beyond, and made Size of the Universe II, and Size of the Universe III.

The channel was likely inspired by Mr NixxxoN, judging by the fact that Size of the Universe III (mentioned below), has similarities to Mr NixxxoN's 2009 size comparison.

Videos
14 videos are known to have existed, only one has been found so far. 8 of them are known, the other 6 are not. All videos were likely made with Celestia 1.6.0 and Celestia 1.5.1 ED, Windows Movie Maker, and likely on either Windows XP or Vista. The known videos are as follows:

[[Zoom out in 30 seconds|"Zoom out in 30 seconds"]]
(Rough guess of title by Aeos)

[[Journey through the Universe|"Journey through the Universe"]]
(Rough guess of title by Aeos)

Other
A video about Nibiru (According to Joey P.)