could this flashing light be a drown?

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I was at work the other night and noticed a flashing light on the church steeple next door. I see this church almost every day and never seen this before, so I took a pic and a quick video.
I really didn't think much of it at the time. I was thinking it was probably a drown that someone landed on the steeple. I sat down and looked at the video and when I looked back it was gone. Pisses me off that I didn't record longer but it is what it is. After watching the video a few times, I noticed another light off to the right side of the video around the 5-second mark. Maybe lens flare? I can't tell.
I tried zooming in on stills and playing with the color of the light on the steeple to see if I can make out any type of frame around the light but I can't see anything.
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