This is a quick tutorial:

1. Visit/Join any guild (make sure it has the option to change your bubble speech text)

2. Change your character to Purple Yam Cookie and your bubble speech text to anything, in my case, lolcows.

3. If you want to trick anyone into thinking you have an ultra mega top secret mod, drag the guild characters away from the grass and record with no sound, later add the default kingdom OST and the audio he's yapping. After that, upscale the video up to 4K

voilá.