I was shooting a video of my kid at the local beach, didn't see or hear anything, got home uploaded the video, seen what i thought may have been a bug or bird? Thought it was just a bit odd looking so i loaded the video into my computer movie maker to slow it down. Then i seen for sure it was not a bug or bird and it was reflecting the setting sun. I zoomed in and the best i can tell it is pill-shaped and reflecting sunlight like something metallic would do. No wings like a bird or a bug. Very fast. Makes me wonder what else i don't see with my naked eye? Was using a gopro in an underwater housing. The lens is slightly curved like a fish-eye so maybe the slight directional path of the object could be due to the lens configuration?Here in this end of the Dominican Republic there is very little air-traffic so when an airplane or helicopter does fly by everyone is looking. Its a rare event so i would surely have noticed any airplane noise but i didn't.