You can now create 3D content on YouTube. In order to create a 3D video, follow the tips listed below.

Putting 3D content on YouTube

YouTube supports 3D video from several different sources. Depending on the way that you recorded the video, you’ll have to follow different steps. If it doesn’t quite work, or look right, try another method.

I have a 3D camera, camcorder, mobile phone, or gadget:

If you’ve got one of these devices, it may produce video in a variety of formats. YouTube supports a few different formats for 3D video. Check the instructions for your 3D recording device to determine which format your device outputs. Once you’ve identified what format the device supports, you’ll have to add the appropriate tag for your device. By adding the right tag, YouTube can determine what format the video is in, and how to display it properly.

If your video format is:

Side by side “half” or “squashed”:

Add the tag yt3d:enable=LR to your video

If the video displays incorrectly or has a poor 3D effect, try changing it to yt3d:enable=RL

Top-bottom “half” or “squashed”:

Add the tag yt3d:enable=LonR to your video

If the video displays incorrectly or has a poor 3D effect, try changing it to yt3d:enable=RonL

I am using two cameras, or two originals to record 3D video:

In order to upload a 3D video to YouTube from two original videos:

In your video editing software on your computer, combine the two videos into a single frame. This provides content for each eye and produces the 3D effect.

For best results, the combined image from the two videos should be in 16:9 resolution. However, keep in mind that the resulting aspect ratio will be the size of the video. So, if you upload a 4:3 aspect ratio video, keep the new aspect ratio the same.

4:3 Upload:                                                         16:9 Upload:

Once you’ve formatted the video to these requirements in your video editing software, upload the final version of the video to YouTube. See this Help Center article for recommended file formats.

While the video is uploading, or after the upload is complete, edit the video and add the tag yt3d:enable=LR.

I have content that’s already recorded in a particular format:

YouTube recommends that you upload video in side-by-side squashed Left/Right. We also currently support the following formats:

yt3d:enable=LR: Side by side squashed left eye frame on left, right eye on right – recommended

yt3d:enable=RL: Side by side squashed, right eye frame on left, left eye frame on right – old format but no longer recommended

yt3d:enable=LonR: Top frame is left eye, bottom frame is right eye

yt3d:enable=RonL: Top frame is right eye, bottom frame is left eye

Note, we no longer support these tags and they should not be used:

yt3d:enable=true

yt3d:swap

yt3d:left

yt3d:right

yt3d:aspect

Quick tips for great 3D content:

• Making content with two cameras? Use two of the same camera model in order to easily match the two images (which will produce your 3D video).
• Secure both cameras on a single solid mount to simplify matters and avoid camera shake. You could try using a small metal bracket (found in hardware stores).
• Objects in the same position in both frames will appear in the plane of the screen. If you pan too far towards the user this breaks the 3D effect.
• Try and use Left Right Side by side format as you will get the greatest device support.

See the original post here: http://www.google.com/support/youtube/bin/answer.py?hl=en&answer=157640