Let me start by saying I have no videos yet. ;) For this year I put 2,016 pixels onto our 24' megatree. I was worried they wouldn't be bright enough as there were 96, 70 count LED stringers on there the previous year. So I put both the LED stringers and the pixel strings up together, to make sure I had enough oomph to go around. The pixel addition is 48 strings of 42 count pixels (5.5" spacing) running on three of Jim's E680 controllers. Three 50 amp 5vdc power supplies, one for each E680.
The 2801 based, 5v pixels are blowing the LED (from CDI) stringers out of the water! They have to be 2 to 3 times brighter, it's simply amazing. I am having to go back and turn down my master levels to half or less to get comparable light.
I'm using Madrix to control the pixels and the lights are too bright to match the on-screen effects. For example, I setup a radial sweep that is a square wave upfront with a fade on the back. On screen, only about 1/3rd of the pixels are red, the rest of the effect is black. On the pixels, you can see a small black radial sweep moving, with an extremely bright red front edge and still strong red most of the rest of the way around! I had to turn that one down to 30% power for it to look like the on-screen version!
Man, if you're on the fence about adopting pixels, take the plunge. It's simply amazing what these things put out.
And yes, in the next week or so I'll get some video put together and posted.
Update: Early video added: http://vimeo.com/33516475