This indicates the file was "ripped" or encoded from an official 3D Blu-ray disc, ensuring high-quality source material compared to web streams. Audio: DTS-HD The file includes a DTS-HD Master Audio

It is frequently cited as one of Pixar’s greatest achievements, holding a 96% rating Rotten Tomatoes 96/100 score Metacritic 3D Conversion:

The Half-OU flag in the filename informs users which 3D format to select.

The DTS-HD Master Audio is the unsung hero of this particular release.