Ken Block's incredible Gymkhana series of stunt-driving videos, sponsored by DC Shoes, are among the most successful examples of branded content ever—just look at the YouTube view counts, which run into the tens of millions.
Fancy sitting through a five-minute-long commercial? I know, you'd rather be boiled alive in hot acid. But actually, there are plenty of long-form spots that aren't just tolerable but wonderful. TED fell in love with some of them while curating its Ads Worth Spreading series. But most of those topped out at three or four minutes.