AP
Most of the videos, which can be found at #MadeWithHoloLens, are a few seconds long and show Microsoft employees messing around with the headset, usually with their children.
Other demos show the more serious side to the headset, which could eventually change how we use computers. HoloLens project manager Varun Mani has shared a demo of "Halo 5: Guardians" streamed from an Xbox One to the headset using Windows 10.
The game, which was released in October, appears on a floating screen in his living room. The gaming isn't anywhere near as good as it would be on an Xbox, but it shows the potential of HoloLens.
Microsoft has bigged up the gaming potential for HoloLens, showing off Minecraft - which the company acquired for $2.5 billion (£1.6 billion) - on stage.
A developer headset, which costs $3,000 (£1,900), is being rolled out at the start of 2016 opening up the device to more than just Microsoft employees.
Here are some other demos from Microsoft employees:
YouTube:
This is how I watch all my YouTube vids nowadays! #MadeWithHoloLens #HoloLensGet yours @... https://t.co/SIefhuiehk
- Miguel Susffalich (@susffalichm) December 1, 2015
Holograms will have always existed in Hannah's world. I'm proud to help make this technology real #MadeWithHoloLens pic.twitter.com/S1atqu0Dgr
- Brad Sarsfield (@bradoop) December 1, 2015
They're letting me post another home video made with @HoloLens. Me and my boy goofing around. #MadeWithHoloLens pic.twitter.com/V2Agf98qjj
- Noble Smith (@ShireWisdom) November 30, 2015
People are asking where I got the @HoloLens video that I posted. I made it! And it's so much fun! #madewithHoloLens pic.twitter.com/P1XSxMAdKN
- Noble Smith (@ShireWisdom) November 29, 2015
CandyCrush on #HoloLens #MadeWithHoloLenshttps://t.co/k9CZu2dCZh
- MohammadMSFT (@MohammadMsft) December 2, 2015