WASHINGTON — Looking for broader remedies to gun violence, Vice President Joe Biden is reaching out to the video game industry for ideas as the White House seeks to assemble proposals in response to last month’s massacre at a Connecticut elementary school. Biden is scheduled to meet with video game representatives Friday as the White House explores cultural factors that may contribute to violent behavior. The vice president, who is leading a task force that will present recommendations to President Barack Obama on Tuesday, met with other representatives from the entertainment industry, including Comcast Corp. and the Motion Picture Association …