Hello.
Just as we talked about on discord, the tier 1 YouTube rank inherits all the permissions of the server MVP+ rank as well as a nice [YouTuber] prefix on all gamemodes. I am not entirely sure what the other follow tiers reward but it would most likely be things such as, beta testing, access to commands such as /broadcast, server store items to show off in your videos. As you progress in this tier system, I'm sure you'd be able to work closer with the Administrators+ in deciding which permissions you get.