More than 177 million U.S. Internet users watched video content in June, according to the latest report from comScore. Google sites, driven by video viewing on YouTube, ranked as the top video content property with 144.5 million unique viewers, followed by Yahoo sites (44.9 million viewers) and Vevo (43.7 million viewers). Google sites had the highest number of overall viewing sessions with 1.8 billion and average time spent per viewer at 261 minutes or 4.3 hours.