IDK I never saw that video. the easiest way for me , and I've done it to my battery, is the way I told you. Only thing is the battery has to be an official SONY battery and i heard it can't be a brand new one. Has to be model PSP 110. I did find a pandora battery tutorial on here:
http://forum.pspdiscussions.com/showthread.php?t=2293
Maybe that will help you, if you haven't seen it already.