The Mixed Reality Forums here are no longer being used or maintained.
There are a few other places we would like to direct you to for support, both from Microsoft and from the community.
The first way we want to connect with you is our mixed reality developer program, which you can sign up for at https://aka.ms/IWantMR.
For technical questions, please use Stack Overflow, and tag your questions using either hololens or windows-mixed-reality.
If you want to join in discussions, please do so in the HoloDevelopers Slack, which you can join by going to https://aka.ms/holodevelopers, or in our Microsoft Tech Communities forums at https://techcommunity.microsoft.com/t5/mixed-reality/ct-p/MicrosoftMixedReality.
And always feel free to hit us up on Twitter @MxdRealityDev.
Download Link for the HoloLens Companion App
What's the link to download the HoloLens companion app to stream live video with the holograms in the scene?
About a minute ago, I came across a link to a download preview page of the app, but I get an error page saying it doesn't exist instead. From doing some research, though, I found out it would be in the Windows 10 App Store.
One result I found of interest is simply called "Microsoft HoloLens." I don't know if that's the companion app I'm looking for.
Based on this link, though, I don't know if the app is even needed.