They look like far off swans.
Large white birds indeed.
when we look at the lack of sharp focus on the towers...and compare the focus of the white “spots”...they match fairly well.
Im thinking an early cell phone video...like 1999 or so...
too big for swans at that distance, but I do love the synchronized flying.
Saw cranes flying together a couple of years ago over spfld mo. The most beautiful sight. They were doing loops and dives all in slow motion. Had a super crappy point and shoot camera with only 30 seconds of video at a time. oh well.