I finally had to contact the seller because after entering the link countless times I could not get the documentation. The seller got back to me within 48 hours with a working link. Well it was not much help as the link included a bunch of out of focus photos and a video that was so poorly done it reminded me of the days of VCR like quality after a tape had been recorded on a few hundred times.
After searching up and down on Youtube, there was no video posted for this specific kit. I decided I should have the video camera ready to document my project build. I can't say I did a stellar job either as it was not possible to go back and film something again once I soldered a step together. But it's better than what they provide you and hopefully some of you will find it a decent resource if you decide to build this electronic kit.
You will need a 25 watt soldering iron, pliers, cutters, electronic solder (60/40 rosin core), 3rd hand and some masking tape. The kit provides plenty of extra LED's in case you have a few bad ones. I would also highly recommend a volt meter with a diode check feature. Without it you will have to risk soldering this whole project together to later find out you might have a bad LED in the matrix. And that's no fun, as for some odd reason I had one even though I tested each one. It took a minor miracle to de-solder that one LED out of the matrix and replace it.
You will also need a USB power source. I used a cheap phone charger dongle that can easily be had at your local drug store like Walgreens. The cube pulls under 200mah at 5 volts.
Once I had the kit soldered up and fully working I went back on eBay and bought the plexi glass cover for the project. I highly recommend this, it makes the kit look better and keeps it free of dust and someone accidentally bending the LED's.
I never did find out what that USB board does. The cube's built in demo animation show is good enough. It's a great conversation piece. Anyone that comes over to you home will instantly notice it and love the coolness of it.