As a still-nascent format, digital video can be a confusing realm for brands to navigate. So do you need it? And if you do, then what? Facebook video or YouTube? Long form or short form? DIY or through a production or media company? Pre-roll, in-feed, standalone or the whole kit and kaboodle? Once you've built it, will they come? And if they do come, how do you measure success? Fortunately, we’ve gathered together a gang of big brains to answer those questions, guide you through some of the trends and help you get better results.