The dog in the videos you posted is probably the worst behaved yorkie I have ever seen. Of course you can find videos of almost every breed on youtube with poorly behaved dogs. I hope you spend some more time researching and realize that there are lost of videos of good dogs out there
My dogs are in the third video posted by MandiesMom and you can find several other videos of them on YouTube. Yes they have their quirks, but they are great dogs!