Er... no... We have to be careful how we talk about the layers. The base layer is the HDR10 or HDR10+ grade and nothing more, so this gives Profile 7 its backwards compatibility. The enhancement layer has two options: 1. MEL - there is a mid-grey 1080p static field which is just a placeholder for compatibility with DV equipment - it contains no usable video information. Then there is the RPU (Reference Processing Unit) which contains the Dolby Vision Metadata. This is dynamic tone mapping information which is applied dependent on the performance of the connected display (defined in the EDID Dolby Block) 2. FEL - in this case there is the same RPU but the 1080p layer contains a video difference signal between the 12-bit Master (or Mezzanine - a compressed version of the master) and the 10-bit HDR10(+) grade. So when talking about "EL" you have to be specific about whether you're talking about the RPU or in the case of FEL, the video essence, or both. Very easily - you can see the RPU working with test videos. The Zidoo now correctly processes the RPU for both FEL and MEL in MKV, ISO and BDMV containers. Ok, the video essence of the FEL is not used (as is the case with the Dune and Shield) but in the real world that's no great loss.