Shapes flying in rows of threes and sixes. In a V shape three per side. Speed of helicopter, no flashing lights no sound

About 500 feet off the ground sorry for this poor video I have a better video but it’s too big for your upload undistinguishable shape it looked around and if they were glowing orange. No sound no flashing lights. I said at my window upstairs and often see the flights coming from the north and they split and go south east to BWI airport or west to fly on to the west they just kept flying Southeast towards the airport no sound nothing and then when they got over my house and proceeded a little further south east they literally disappeared. What was really strange is normally at that hour there are several airplane one right after the other heading into the airport there was nothing the rest of the evening not even up until midnight