Not to confuse with my other article "Changing the huawei u8650 boot splash" hehe!
This time we are gonna change the boot animation, which is what appears after a little blink that we can see while booting, and until the very moment you are presented with the login (PIN) screen.
The file to change this time is /cust/yoigo/es/media/bootanimation.zip, its format is rather straightforward. It's a regular zip file (though its elements are uncompressed, just stored, more about that later). You can unzip it with 7z or with the unzip tool. Either way, you'll obtain a few directorios (part0, part1, part2) with some png files inside, and a file called desc.txt, which is what holds the info about how the frames are presented.
The yoigo stock desc.txt file is as follows: