Very fast light off of Siesta Key

Very fast light off of Siesta Key
Time: 6:13 PM
Location: Siesta Key, FL looking at gulf

Reposting because of formatting.
My first post was flooded with reasonable skeptics so here’s my response to the FAQ:

“Why is the video so short?”
I started recording as soon as I could and stopped because I began to run down the beach to keep it insight. About 20 seconds after the video cut, it disappeared behind the bend of the coastline.

“It’s just a boat”
Yes, this is the most reasonable explanation… at first. I am also inclined to believe so as well. However, I watched boats cruise by all day at this beach and didn’t see one go remotely as fast as this. Also, the rest of the boats I’ve seen at night display red/green navigation lights. Since it was moving forward, to my right, I should have seen it’s green starboard side light on it’s right. If the white light was being produced by a headlight, I would expect it to disappear or at least dim as the boat passes and I can no longer see it head on. I am sharing to try and add up about these details. 

I watched it until it disappeared around the coastline and never saw any sort of port/starboard nav lights. As you can see in this video, it was moving pretty fast. It was completely silent and seemed to produce enough light to illuminate the surrounding water a small amount. 

Doing some very rough math, we can estimate ROUGHLY the speed of this light. In the 12 second video, I pan roughly 30° to the right. I was able to see coastline above this, which at eye level, means it was less than 3 miles away. If it it was 1.5 miles away, trigonometry says it traveled roughly a mile, in 12 seconds, comes out to about 260 miles per hour. I trust that guess, because I have been watching passenger jets fly over at roughly that speed this entire trip, and it looked to be going roughly that speed.  

I am just providing information about what I saw here. I am a believer, but I don’t want to seem like I am pushing any of my conclusions here.