The sensation of depth is both a function of the eye, and an experience of the mind. You don't even need to use both eyes. Try this out:

• Block off one eye with your hand, and start the video again.
• Notice your mind creates the experience and enjoyment of three dimensional depth perception. Switch to the other eye.

Many people find that simply observing the movement and depth with both eyes singly and together is both mentally and visually relaxing.

Start the video again, relax and let go as you look into the space, and try this:

• Pick one of the slow moving dots and follow it, tracking with your eyes.
• If your dot moves off the picture, just choose another. There are a few dots that slowly move right across the image.
• Notice your dot moves further into the depth as it travels to the right. Remember that this depth is created by your mind.
• Once you're at ease following a dot, be aware of the movement elsewhere in the image. Notice that where you are looking - at your dot - is a different thing from where you are not looking - all the movement of the other dots.
• Let your peripheral awareness expand further, to the edges of the screen and even to the depths in the surrounding space, behind your screen.
• Close your eyes, and relax. Check that you are still breathing easily. Repeat the steps above as often as you wish.
• Once again look at the impression of the entire image noticing it's three-dimensional quality. Really give your mind the time it needs to understand it. Relax.
• Finally, break free from the screen and look around your environment. This is genuine 3D. Your eyes will be choosing a centre, notice where that is and let the impression of the whole picture reach your mind. If you make any movements with your body or your head you might notice that the 3D quality is enhanced; you can see the perspective changes in real time, with objects looking like they are moving in relation to each other. Relax as you look, breathe easily.