scenes confrontation late friday also appear videos upload social media capture attention venezuelans many blame unpopular president country food shortages.in one video mr. maduro try calm pot-bangers walk among surround furious crowd yell obscenities astound voice behind camera ask one video clips.mr maduro travel capital caracas margarita island venezuela northern coast inaugurate number new public house units give televise address.during speech denounce opponents call removal office call vampires say prepare violence.foro penal venezuelan human right group say 20 people arrest protest island town villa rosa mr. maduro office make statement episode angry venezuelans chase president…bang pot yell video