All the ones I've seen where posted by members of different embroidery groups on Facebook. Somebody mentioned trying to record one detailed enough to post on youtube but I haven't heard anymore about it.

Cutie michele921 posted one in projects. If you scroll down & read her comments, she tells you how she made hers. She also made an embroidered football.
http://www.cuteembroidery.com/9688303_baseball-name-number-love-how.html
Here is the football, complete with her explanation on how she made it.
http://www.cuteembroidery.com/9697677_sorry-pop-little-ones-baby.html
I hope this helps. You can also pm her for additional information.
http://www.cuteembroidery.com/michele921