User blog comment:DiegoAnime3000/Not really spoilers/@comment-3146930-20140413220423

It is more of a matter of showing respect to the creators and other users. For example, those that are sponsors for Roosterteeth are able to watch their videos about 2 hours before anyone else. That means we already know what is going to happen, but going onto the site and editing the pages or making a discussion blog would cause spoilers and possibly ruin it for others. Sure you could say "Just don't look," but there are a few problems:
 * If you are an admin, rollback, or just someone trying to be helpful, you may unintentionally see a spoiler while trying to check to make sure an edit is a good one.
 * Discussions with vague labels could lead to spoilers.
 * Even if everyone will see the same trailer in time, not everyone has seen it yet and want to be surprised.

It is kind of like how Wikipedia won't allow people to edit movie pages until the day it is officially released, even if most theaters will start airing it Thursday nights.

Lastly it is a matter of policy. Any type of leaked or early information not officially released by Roosterteeth is considered a spoiler, and as we both know spoilers aren't allowed. That video of the intro was taken without Roosterteeth's permission and even if Monty says he doesn't mind us looking it up, he did ask us to have respect for those that haven't or don't want to for whatever reason.