Paperback Writer and several other Beatles songs were released in the dawn of the Stereo era. The original album mixes are quite weird by today standards: you can hear the instruments isolated between the left and right channels.
This is a remixer's paradise. With some effort you can separate almost all the independent instruments and play with them. That's exactly what I did here. Beatle fans will want to kill me, but I think it turned out quite well.
The bit at the end came from the internet. Those of you who speak portuguese will certainly have a laugh. ;-)