Display Vuforia+Hololens experience on projector/TV screen

I"m not sure how it's being done in this example, but I don't think the second HoloLens is viewing the presenter's copy of the experience.   It looks like the second HoloLens is viewing it's own copy of the experience and that is being shown on the screen, although I don't know how the selections are being done.

But if you just have a single HoloLens and you want to show the view that the user is seeing on a screen there's multiple ways to do this.

1. Use the HoloLens App on a Windows 10 PC and connect it up to your HoloLens: https://www.microsoft.com/en-au/p/microsoft-hololens/9nblggh4qwnx
2.  Connect to the HoloLens via the device portal and show the view that way: https://docs.microsoft.com/en-us/windows/mixed-reality/using-the-windows-device-portal

Some of this information is reference in the Studio Help pages about HoloLens: http://support.ptc.com/help/vuforia/studio/en/#page/Studio_Help_Center%2FEyewearBestPractices.html%23wwID0EFN1O

I regularly show the HoloLens view on my laptop screen by using the HoloLens App.  Then my laptop is connected to a project or big screen and everyone can see what I'm seeing.  It works pretty well, but there's usually a bit of lag.  It's always better to view the experience through the HoloLens as it will be in stereo 3D, so if I've got a smallish group, I'll show them how the experience works as I run through it and then they can put the HoloLens on and run through it themselves.

Some tips:

• Don't start the screen sharing until you've got the experience loaded.  If you are sharing the screen when being asked to scan the ThingMark, it will prevent the scanning from working.
• I think the screen sharing prevents model tracking from working.  I haven't tested this is the latest version.
• If someone else is using the HoloLens to view the experience, turn off the screen sharing as it slows down the HoloLens and makes movement in the experience slower and more jittery.
• Use the voice command to start the sharing: http://support.ptc.com/help/vuforia/studio/en/#page/Studio_Help_Center%2FEyewearViewAndHololens.html%23