The most watched video in history is "Gangnam Style" It was also the top video for 2012. No information could be found specifically on the top Christmas videos for 2012.
The Now - 2012 Top 7 Viral Video Kids in 2012 1-12 was released on: USA: 12 December 2012
Top 100 Video Games of All Time - 2012 TV was released on: USA: 11 June 2012
gta4
Dark Souls
One can watch a top 12 video of the best dunks of the NBA 2012 online on sites such as NBA, YouTube, and Dime Mag. You may also be able to find them on sports channels.
Viral Video Showdown - 2012 How-To Video The Musical was released on: USA: 5 December 2012
2012 MuchMusic Video Awards - 2012 - TV was released on: USA: 2012
2012 MuchMusic Video Awards - 2012 TV was released on: USA: 2012
The Video Vault - 2012 was released on: USA: 1 July 2012
The Video Journal - 2012 was released on: USA: 10 June 2012
The PS3 and Xbox 360 release is March 20 2012 according to GameStop