Video from the D810 remains among the best you’ll get from a DSLR, and all the options that made the D800 so popular in this area remain intact. Nikon added a stereo microphone to make nicer scratch tracks for your moving pictures or for those situations where you don’t feel the need to use an external audio recording device.

http://www.popphoto.com/gear/2014/08/camera-test-nikon-d810

We have received a few reports from some users of the Nikon D810 digital SLR camera indicating that noise (bright spots) are sometimes noticeable in long exposures, and in some images captured at an Image area setting of 1.2× (30×20).

After looking into the matter, we have determined that some noise (bright spots) may on occasion be noticeable when shooting long exposures, and in images captured at an Image area setting of 1.2× (30×20).

Nikon service centers will service these cameras that have already been purchased as needed free of charge to the customer. We sincerely apologize for any inconvenience this issue may have caused.

Identifying affected products

To check whether or not your camera is one of those affected by this issue, please click the Affected Product Serial Numbers link below and enter your D810’s serial number as instructed. Your camera’s serial number will be checked against those of affected products. If your camera is one of those affected, you will be forwarded to additional instructions. If your camera is not one of those affected, you may continue using your camera without concern for this issue.

http://www.nikonusa.com/en/Service-And-Support/Service-Advisories/hyvanded/Technical-Service-Advisory-for-Users-of-the-Nikon-D810.html

When it comes to image quality, the Nikon D810 is surely a beast.

http://www.thephoblographer.com/2014/08/17/review-nikon-d810/

http://www.dpreview.com/articles/3094466889/nikon-d810-a-sport-photographers-impressions

The camera delivers impressive image quality with improvements in noise performance, as well as an extended ISO range. Video quality has been improved, and not only does the camera offer additional colour settings for photography (including a new clarity setting), the D810 also offers advanced video colour settings for those that want to get the highest quality and dynamic range from video. With a tried and tested body design inherited from the D800/E, the camera delivers high image quality at an improved shooting speed.

http://www.ephotozine.com/article/nikon-d810-digital-slr-expert-review-25758

http://www.imaging-resource.com/news/2014/07/30/nikon-d810-gallery-images-posted-high-flyers-rodeo-riders-and-iso-for-days

http://www.dpreview.com/previews/nikon-d810/7

So are those 14.8 EVs of DR will be all there in video flat mode ? If yes it's huge.. a lot of DR. Also wondering if hdmi outputs an 8bit ot what... any idea ? Thanks

The Nikon D810 is an incremental upgrade of a great camera, adding slightly better image quality and a smattering of new features to the best-selling D800/E, most notably the improved shutter mechanism and electronic shutter option which help to combat unwanted vibrations, and the beefed-up video mode.

http://www.photographyblog.com/reviews/nikon_d810_review/

http://www.ephotozine.com/article/nikon-d810-dslr-sample-photos-25856