Bright lite hovering but moving fast from side to side, up and down

The only light to be seen. Very bright. Hovering, but moving fast up and down and sideways. Have seen it here before. It appears to be closer to the ground than a plane would fly. I saw a plane fly in the sky at the same time, and the plane was further away. Last time I saw it was maybe 9 months ago, I dont remember, but it moved un predicable, like would just dart up or sideways pretty far. This time from what I've seen so far it still goes from side to side, up and down but not as far. I took some pictures and video. You can't see it move as mush in my videos as you see in person.
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Im not sure what it is but it moves pretty fast and just sits there then moves. Last time it was all over the sky. Just seems a little odd and out of place.