The news site’s Barry Schwartz discovered a recent thread on the YouTube help forum and found out an employee named Pete is experimenting with the 3D viewing feature on his 20% free fiddling time:
I’m the developer working on the stereoscopic player as a 20% project. It’s currently very early, hence the silly bugs like swapping the eyes for the anaglyph modes. A fix for this is in the works.
The current tags are provisional and may change or expand. They are:
yt3d:enable=true Enables the view mode. (obviously you’ve already discovered this)
yt3d:aspect=3:4 Sets the aspect of the encoded video.
yt3d:swap=true Swaps the left and right sources. You may need to add this to videos when the player with fixed anaglyph modes ships. Apologies for the inconvineince (sic).
Your feedback and suggestions are welcome, but as this isn’t my primary project I can’t promise a speedy turnaround with improvements.
An example video can be found here.
(Image from SE Roundtable)