Apparently the reasoning behind this is that I used "misleading titles / thumbnails" - Which makes no sense, as every thumbnail and title I use, relates to what's in the video, no matter how mysterious. Waiting for a reply @TeamYoutube to rectify this so I can get back to work.
I've formally requested reinstatement, and will continue with due diligence, to rectify your hard work and dedication to you and your fans. Fan forever, James.