Hulu has recorded one of the largest gains in viewers in its short history, according to new data from Comscore. In October, the multi-studio video site hosted almost 856 million viewers, its best ever result and a 47 percent jump from September. The results were well behind Google's 10.5 billion views and 37.7 percent share of web video in the US but were enough to give Hulu second place with 3.1 percent, about twice as much as its next-best challengers.