i think what you did is fine. i do pretty much what you do when i have a video, and as far as i can gather, a lot of power identifiers will simply skip the videos if the photos in the observation are enough evidence for identification. (i presume this is because viewing a video takes more time than viewing a few photos.) every once in a while, folks will watch the videos just for enjoyment though.
in your case, it’s fairly clear what the bird is from just viewing the photo in the observation.
here’s a past thread related to video in observations: https://forum.inaturalist.org/t/videos-for-observations/5408.