The headphone plug I show in the video is $4.19 (2 pack), here's the link:
http://www.radioshack.com/product/index.jsp?productId=2104061
Another Gold plated plug is also $4.19 but it only has one plug in the package. This one requires NO SOLDER:
http://www.radioshack.com/product/index.jsp?productId=2103990#pr-header-2103990
































Thanks for watching! -RM
A pitfall I ran into with my headphones, which are an old pair of Sennheiser HD435 Manhattans (sadly no longer available), is that the wires each contain a small fiberous core which is very cut resistant, enough so I couldn't cut the wire with a wire cutter. It also wouldn't stay twisted, and was just a general pain in the neck. I finally had to cut it out of the red and green wires with a pocket knife, just to get it out of the way. A hassle, yes, but maybe this cloth core was why this wire lasted for 17 years before it shorted out.
I forgot to pick up fine grit sandpaper to clean the wires, so I (very carefully) used a piece of brand new Scotch Brite scouring pad, mostly green nylon but with enough abrasive in it to do the job.
After I had the ground wires soldered on, I realized I had done it upside down, so the red and green wires couldn't reach to their correct positions without crossing. Oops. So, the channels are backwards. Luckily, the headphones are perfectly symmetrical front-to-back, so I can just wear them backwards, problem solved!
It was a cobble job, admittedly, but it works, so I am happy.
Thanks for watching! -Rich