Triangle UFOs Over Southern Ontario is Birds Under Analysis

I came across a great analysis video posted to reddit by the following user:

https://www.reddit.com/user/CacheLack/

I could see the birds wings flapping because of it and I commented saying so, however I got quite a few comments saying that it couldn't be birds.

So I did some further review and analysis on the footage attempting to show the wing flapping. I also added in a capture from Jason Suraci, showing a bunch of birds which eventually formed into the same kind of triangle shape.

Source Link from CacheLack : https://www.reddit.com/r/UFOs/comments/xu7bju/im_zoomed_slowed_down_the_this_flew_over_my/