E4.avi Guide
If "e4.avi" refers to a video related to chess, "e4" is a popular opening move in chess, where "e4" indicates the move of the pawn in front of the king two spaces forward. This move is known as the King's Pawn Opening and is one of the most aggressive and commonly played first moves. It could be part of a chess tutorial, analysis, or a recording of a game.