I don't understand what I'm looking at in the video of this Elon Musk tweet. The text says:

Just leaving SpaceX Starship build site in Boca

These are reminiscent of funhouse mirrors. What are these things exactly? If they're rocket parts, where on the rocket do they go?

Screenshots (click for full size):

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    $\begingroup$ Only a guess, those are curved panels covering the root / hinges of the fins, creating a smooth aerodynamic fillet, protecting hinge's actuators from heat, housing wirings, tubings, maybe even fuel line from upper tank to engines ( don't know which tank is on top, methane or oxygen) $\endgroup$ – qq jkztd Sep 28 '19 at 8:45
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    $\begingroup$ @qqjkztd I just ran across this: youtu.be/lRbKZqg5W-I?t=101 $\endgroup$ – uhoh Sep 28 '19 at 9:28

According to The Man Himself

Raceway & flap hinge aero covers

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More here, more speculative. Doesn't match current planned configuration?

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  • $\begingroup$ Okay I'm getting the picture now, thank you! $\endgroup$ – uhoh Oct 9 '19 at 16:25

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