Hummingbird: another video clip-[post note: prob Black-chinned]

[POST NOTE: I have requested and received feedback from several members of the Texbird listserve, including those with considerable experience and expertise, that all agreed this is not an Ann's Hummingbird. They all also agreed that it is, or it is suggestive of, a Black-chinned Hummingbird.]
Though this hummingbird holds it's tail still at times, at other times it pumps it as is shown in this clip. There are groups of feathers with color (that is not clear in this clip) on it's whitish breast that can be readily viewed when the video is stopped briefly. SeEtta