Our June 2008 Online Video WebTrack evaluated the state of European online video advertising by reviewing 583 online video clips and 137 in-stream ads across 49 sites. Interactive marketers have more opportunity than ever before to reach Internet users with video ads: More than 90 million European adults watch online video content each month, and the majority of European sites now offer in-stream ads. However, to take full advantage of this opportunity, interactive marketers must follow best practices and avoid a variety of common pitfalls.