Mobile video is experiencing an explosion that just keeps on exploding, and that’s giving national marketers an opportunity to spend more on location-based advertising for reaching consumers in more contextually-relevant – and personal – ways. Smartphones now rival desktop in terms of video consumption, and will likely pass desktop in the coming years. According to data from AOL, 57% of consumers around the world now watch videos on smartphones every day; for desktop, the number is 58%. And while consumers are gradually becoming more comfortable with watching longer-format videos on smaller screens, short-form video is still a widely popular form of entertainment on smartphones. AOL estimates 42% of consumers globally view videos that are five minutes or less in length…