At last month's Video Ad Summit, mobile video was a big topic of conversation. Kicking off the day, eMarketer's principal analyst, David Hallerman, walked the audience through his firm's online video ad forecast, including the mobile component, which it estimates will quadruple to $5.44 billion by 2018, over 44% of of total online video ad spending (the full forecast is available for complimentary download here).

Later in the day, Jim Spencer, president and founder of Newsy (an ad-supported mobile video news app acquired earlier this year by E.W. Scripps) led a spirited panel on how media and technology companies are keeping up with mobile video's surging adoption. Joining him on the session were Ashish Chordia (founder & CEO, Alphonso), Jason Krebs (head of sales, Maker Studios), Rebecca Paoletti (CEO and co-founder, CakeWorks LLC) and Canaan Schladale-Zink (VP, Sales North America, Sizmek).

Videos of each of the sessions follow below.