So, rather than re-invent the wheel, I’ll read to you Google’s statement regarding the details of the video, and the purpose behind it.
As part of our continued effort to be more transparent about how search works, we’re publishing video footage from our internal weekly search meeting: “Quality Launch Review.” We hold the meeting almost every Thursday to discuss possible algorithmic improvements and make decisions about what to launch. This video is from the meeting that happened on December 1st, 2011, and includes the entire uncut discussion of a real algorithmic improvement to our spell correction system. The language can be technical, so we’ve included annotations to provide some context for the discussion (and have a little fun!).
You can watch the video at the youtube link listed herehttp://www.youtube.com/watch?v=JtRJXnXgE-A . Or, just go to youtube and type in “Search Quality Meeting: Spelling for Long Tail Queries”.
I recommend doing so, as it’s an opportunity to take a rare look behind the curtain so to speak. With over 500 updates a year, it’s both insightful and interesting to see the process involved in each.