Google highlighted YouTube’s audience and revenue growth in last week’s Q2 ’15 earnings call, with viewing time up 60%, the number of advertisers up 40% and the average spending of the top 100 advertisers up over 60%, all vs. a year ago. While Google has never broken out detailed YouTube performance, these selected data point to strong momentum at the video site.

At the 2015 Video Ad Summit, our session, “How to Capitalize on YouTube’s Vast Landscape With Winning Video Ad Campaigns” helped explain why YouTube is succeeding. The session included Michelle Bandler (Director of Brand Activation, Google), Al Cadena (Senior Account Director, Beeby Clark+Meyler), Hermann Hassenstein (Global Head of Marketing Planning, PUMA) and Art Zeidman (EVP, Chief Revenue Officer, Pixability), with Mike Shields (Senior Editor, The Wall Street Journal) moderating.

The session explored, among other things, how ad buyers think about YouTube and the key challenges the site faces in persuading traditional TV ad buyers to pursue YouTube. These include measurement, sales lift, business processes, incomplete experimentation, etc.

The group also discussed how advertisers work with YouTube influencers on branded entertainment, the rising importance of mobile, the impact of Facebook, how ads are optimized for YouTube and social media, plus much more.