Its not adding up.
Find a ton of other Youtube accounts and videos uploaded on December 12 2012 about Lords of 2112. There's hardly any.

If this was from The Author of Lords 2112 then why upload a 15 second video??

Look at the timing. The Youtube account was created December 12th 2012. Compare it to Adam Lanzas possible timing of events -

1. Adam Lanza created a Youtube account called "Trolleyrulle" on December 12th 2012.
2. Adam Lanza then created a 15 second video, kind of like a digital suicide note with a short description just a day BEFORE he was going to go on a shooting spree.
3. December 14th 2012 he carried it out.

People say you can edit the text over the video after it has been uploaded, sure. But what about the name of the Youtube account? "Trolleyrulle"?
Its linked with what the text says on the video.

If you can edit the name of the text over the video then why was this Youtube account created just two days before?

It has definitely got to be him.

Adam read Lords of 2112 and knew his whacky shit regarding conspiracy's etc.
Its a mind fuck.
He knew it and planned it all out.

There is no Author involved here, it was created by Adam Lanza two days before.