HDR
mrv2 supports HDR internally but currently cannot display it on an HDR monitor or TV set, as it is a limitation of OpenGL.
What can be done is to use an output SDK + output device connected to an external monitor or use NDI® Tools if using NDI®.
NDI®
NDI® uses your local LAN to transmit the video through and can be used for reviewing content among artists.
If you want to view NDI® with full HDR on a computer monitor, you can use the NDI Tools (macOS or Windows only), which can be downloaded from:
NDI® is a registered trademark of Vizrt NDI AB