All TestVid streams start as fully uncompressed YCbCr (YUV) images. These streams are available as 4:2:2 or 4:2:0 video using anywhere from 8 to 12 bits per component (12 to 24 bits per pixel). This article describes the pixel layout for the TestVid streams, which will allow you to write your own readers, if necessary. The pixel type is available in the DHDR files included with your Tvids. Standard UYUV, V210, yuv2 and other uncompressed formats are also available via the included translation software.
The DT3D file format is an XML file that describes the video and audio channels that go together to create a 3D or stereo file set. Normally this includes the left and right eye video streams as well as audio streams.