If you don’t want to watch the entire video watch it at about :40 or so. The plane or ufo he is watching looks like it shoots something or drops something from the rear.
Then what really caught my attention is the thing that comes into view at about the 2:30 point. It looks almost like an old school t.v. antenna but it looks to be suspended in midair or it’s floating / flying. I’m quite certain it isn’t a cloud or a bug.