A survey by the Interactive Advertising Bureau out this week simply emphasizes a trend we have all witnessed for a long time – that is the rise in viewing long form video content on portable, battery constrained, devices. Its core message is that advertising on this type of long form mobile video should be tailored to each individual. The IAB says in its survey “Mobile Video Usage: A Global Perspective,” with data from across 24 countries, that 36% of respondents watch videos 5-minutes or longer on their phones every day or more frequently. Naturally this type of viewing is on the rise and the IAB has a truly vested interest in making sure we are aware of it. Top countries…