Wonky Donkey by Craig Smith, published by Scholastic Books.
Yes, I saw the video on Facebook and just had to have this book. I listened to the song on YouTube, but I wanted something my kids could sing together with me as we read the book. And no, I have not been able to make it through the book without breaking up into major giggles. We like to make the ending Hee Haw as 'donkey-like' as possible.