Windows Central posted 9 things you should know about shooting 4K video on the Lumia 950
A quote from the article:
I used the Lumia 950 to shoot some videos over the weekend while walking at the High Line in New York City. I didn't use any rigs, stabilizers, or tripods. Without any fancy editing, I combined the clips so you can check the video and audio quality for yourself. Take a look at the video and read some of the things I noticed while shooting 4K Keep in mind that the Lumia 950 XL has a similar camera.9 things you should know about shooting 4K video on the Lumia 950 @ Windows Central