In Beet.TV interview, American eMarketer Senior Analysist David Hallerman, believes that online video is becoming a very important medium for advertising. He calls for longer content, thus there could be more ads.

“Overall, online video advertising will grow at a 40% clip this year and for the next few years, outpacing most other ad mediums, Hallerman said to Andy in the interview.

That increase would bring online video ad spending to $1.1 billion this year and $4.1 billion by 2013. Other estimates place total spending at a smaller amount: media agency Magna projects Web video will corral only $699 million this year and won’t reach $1 billion until 2011.

Despite the different projections, researchers agree that Web video will remain a rare bright spot and continue to outpace other mediums. But, the recession is still affecting Internet TV, and its growth this year is well below last year’s more than doubling of dollars, Hallerman pointed out”.

Well… in CityVice we wholly agree, thou the growth will also come from more focused short-form content. Relevancy is the key word.