I saw what looked like a jet stream appear yet there was no visible craft causing the trail. i began recording as the trail became larger and closer because i found it odd that there was no trace showing which direction it came from. i was facing west when it appeared, i thought it was traveling east because it seemed to be coming closer to me but then took a more nw direction. i live by 2 airports, and an afb is about an hour or so from me but again, there was no visible craft.