In the video, the bird follows the pattern shown in Sibley's for Allen's Hummingbird aerial display: look carefully to see the little dot as it shuttles back and forth 5 times, then climbs high in the air before its final dive.
Illustration of hummingbird display patterns, from The Sibley Guide to Birds
Notice the sound it makes in the video: back-and-forth buzz, punctuated by a stutter sound at the end of each pendulum arc, similar to this Allen's male flight display audio on the Cornell website.
About 25 seconds into the video, listen for the noise it makes at the bottom of the final dive and compare that to the sound at the end of the Allen's male flight display audio. They both sound like a high-pitched fireworks or bottle rocket whistle sound.
For comparison, here's the Rufous wing-buzz during aerial flight display audio on the Cornell website. The Rufous dive sounds lower pitched.
Near Brookings, Oregon
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