This is a groundbraking figure:
U.S. Internet Users Viewed 10 Billion Videos Online in Record-Breaking Month of December, According to comScore Video Metrix
Not sure, if this is really due to the writers strike as it si claimed there. Could be anything.
Other question: what is the total number of videos watched around the globe? And how does that compare to time spent in front of the TV, measured in total hours, for example?