I have felt something was a bit off with the depth control on LeiaTube ever since my Nubia Pad 3D arrived and I finally figured out what it is! If you frequently use Leia Tube chances are the same thing is happening to you without realizing it.
Knowing that this issue exists and how to deal with it makes the LeiaTube viewing experience much better. I explain the problem and how to quickly fix it during each viewing in my video here: 3D depth slider for YouTube is broken. Here's how to fix it - YouTube