- Traditional banner ads. E.g. YouTube, Yahoo! video, Yahoo! music, etc.
- Pre-roll, post-roll, and mid-roll ads: ads that are played before, after, and during the playback of online video. This is by far the most common use of ads in online video.
- There are different version of these "roll" ads ranging from the tradiational pre-roll (as in Yahoo! News, MSN Video) wherein the user cannot fast forward the ad prior to watching her video.
- The advertiser inserting post roll ads based on the video context. E.g. Revver - insert Verizon ad after Prince music video featuring Verizon phones.
We need to differentiate between UGC and non-UGC content. The former is more amenable to advertisement such as contextual ad, pre/post roll. Ads for UGC is best served by banner ads.