Due in part to the popularity of viewing mobile video content on a mobile device, consumers prefer smart appliances that offer 4-inch or larger screens according to a new study from NPD Group.

Before determining if different video formats are needed to support mobile smart appliances, web video marketers should ascertain the percentage of their audience who view content via iPhone, Droid and other smart phones.

Long-form video viewing on smart appliances is expected to grow, with most people viewing mobile content during traditional broadcast primetime hours.