At :12, actually in the thumbnail too, you will see what I see in the sky, multiples, most nights. Notice the lack of details in the actual craft itself, just more of an outline. However, I have only witnessed a few "contrails" (not like this one) that are basically arrow straight lines. The triangles can make immediate jumps from hovering to mach 10 plus and it's more like a beam of light left behind, not a gassy contrail. What has often alerted me to their presence was a flash of light, which I believe is what is produced when they make that jump to hyper sonic speeds.