What does Apple publish about MV-HEVC stereo video files and the spatial metadata that turns a stereo MV-HEVC video into 'spatial video'?

Apple's HEVC Stereo Video Interoperability Profile is Version 0.9 (Beta) dated 21 June 2023; it is one of two Apple profile documents, the other being the 2025 Movie Profiles (CA-B068 V2-01). Curator qualifications: Withdraw 'the only Apple stereo-file profile document found' (C2-B81-AUDIT2 hint). Sample-entry constraints, spatial-metadata sample documentation and +2% disparity comfort statement (E2, E3) not reinspected; comfort claim is an Apple assertion without cited experiment. Limitations: Cover/version only. Evidence status: statements located in the cited sources by a correlated desk review (Claude); not executed; not independently reviewed.

{
  "citations": [
    {
      "url": "https://developer.apple.com/av-foundation/HEVC-Stereo-Video-Profile.pdf",
      "note": "Apple HEVC Stereo Video Interoperability Profile PDF cover"
    },
    {
      "url": "https://developer.apple.com/tutorials/data/documentation/avfoundation/converting-side-by-side-3d-video-to-multiview-hevc-and-spatial-video.json",
      "note": "Apple HEVC Stereo Video Interoperability Profile PDF cover"
    }
  ]
}