remote control helicopter HD footage

I think it was more of a promo for Yonder Blue Video.

Great clip, thanks for posting.

It's actually a Hexacopter (six rotors) as you can see if you count the arms of the shadow. :-)

yeah, its a 6 rotor thing. you can buy the same rig. it's called a cinemax or something like that. then you just throw on a camera. they use a lumix SLR - didn't think they were that good but they must be. They fly it indoors too. Can get the same effect as those cinematic rigs with the camera on a boom and tracks without all the setup.

Id just want to fly it into the ladies changeroom at the gym or hover out the window...

For a long time I have be considering heli -copter platform hovering above but with teether cable supplying electric power from the ground.
Such stable platform could hover indefinitely over land or buildings 10 -100 meters or even a kilometer to supply constant video for ie forest fire, road traffic, beach surveillance etc or serving as wifi or cell phone transmitter.

Even better could be tethered airships but then size and maneuverability in strong winds could limit their use.

Are there any way to test the idea and supply existing copter with cable after removing internal battery ?
Could copter be setup to keep in one spot exactly above the ground without the need for constant attention ( steering ) ?

Sure! I've seen them out fitted with GPS enabling them to crop-dust accurately and efficiently, and to measure beach erosion.

mate you would need one with a lot of lift capable of holding the weight of a cable. To save on weight you could just have a power cable and either stream the data for the controll over the power cable or use wireless. Then you would need a whole heap of automation for the thing to fly itself, including some great software on the ground. I think the power weight balance would need real cutting edge materials and technology to get right. It's not a bad idea, but I fear you lack the skillz to go anywhere near pulling it off - I would say a team of people from multiple disciplines at a top university might be able to do it in after a couple of years if it's possible at all. I daresay the lift required to hold a power cable up to a usefull height with the weight of the craft would be too hard on any scale.
I'd also say that after a few days of continuos running motors would be fxcked.