This week's Trends: mobs, ads, and Passover

Each weekday, we at YouTube Trends take a look at the most interesting videos and cultural phenomena on YouTube as they develop. We want take a moment to highlight some of what we've come across this week: We featured YouTube's top 10 most-viewed flash mobs of all time. …

Devamı: This week's Trends: mobs, ads, and Passover