Ball Lightning Caught on Video
old.reddit.com
old.reddit.com
As it is, I can tell something happened maybe, but it might be ball lighting, might be a UFO, might be a particularly brightly-lit Bigfoot.
Edit: Thinking it over, I hate to agree that the compression is too strong. It's too grainy to see if there was something there, like a powerline wire, that was lit up instead of thin air.
the original youtube upload from the same person