There are lines in Sanctuary that are intended to be backwards. They are:

I need more affection than you know
I need true emotions

Those lines are said several times in reverse through the song, but those are the only two lines that I know of that were intended to be played backwards. I watched the video, and all of those other lines, as interesting as some of them are, are just coincidence that the guy is making. The artist of this song released the lyrics, and she specified what lines where played backwards. I don't think she would have hid any of them.