Video sharing site Vimeo has launched a new way to stand out from rival YouTube: enable its premium users to upload full-length features.The site said today it will increase the size of files its Vimeo Plus members upload from 2GB to 5GB. That is large enough to play a 2.5 hour video in HD. “Creators can now share their feature films, full-length documentaries, or a whole Little League game in HD,” the company said. New York-based Vimeo, owned by InterActiveCorp, has pitched itself as an alternative to YouTube since launching in 2004, and doesn’t limit the lengths of its videos, just the file sizes. This week, the service also announced it will be integrated into Vizio’s new onscreen offerings on its web TVs, which include iPhone-like apps from Hulu Plus and Blockbuster on Demand, and soon Skype and gaming services from OnLive and Namco Bandai Games. In December, the company launched the Vimeo Video School, made up of more than 800 video lessons for aspiring filmmakers.