That's great, I'm glad the video was helpful! I love working with little peices of this stuff and the www.sparkfun.com/products/10878 EL Escudo Dos shield to do animations :)

That's a great point, I could solder the wires to the copper first, I think that might be better, as long as I did the soldering on a hard flat surface. I could use epoxy, but I find it messier and slower. Usually when I am making my own pads like this it is because i am cutting half a dozen peices of panel that I plan to animate and/or separately mount on a fairly rigid surface, and superglue and tape seem to be about the right about of time and mess for those purposes. If I my peices were going to be flexing or the wires were going to be moving around, I think the epoxy would absolutely be better.

it would be a very interesting experiment. You'd need to put a hole through the back to the non-glowing bus layer, but not go through it at all, heating up something blunt might do it. The panel has one big flat bus in the middle and a long skinny bus around the edges that connects to the ITO coating, the invisible top electrode, usually in one place the big bus panel goes out through the side to where the plug comes at the factory. You'd need to keep at least some of that skinny outside bus somewhere on your finished piece to attach the second electrode.

I've never attempted soldering, I would expect the plastics to melt. The current is so low that any conductive ink that sticks will work fine, if you don't have any conductive ink you might even be able to use a few drops of water and a drop of elmers glue mixed into some finely ground pencil graphite.

I'm just using a pocket inverter, it converts 2 AAs to >100vac at the correct frequency. Check adafruits EL panel product page for detailed specs.