>>8400512pb

Well, it might me blinking Morse but if so the sender's fist is awful.

Here is what I got after slowing it to 1/2 speed and trying to figure out a reasonable threshold for dot, dash, space and letter spaces.

Also the right side had incomplete spaces where the bulb didn't completely extinguish.

Seven Second Clip

LEFT SIDE BLINKS:

_ . . _ . . . . . . _ . _ . . _ .

Possible character interpretation

_ | . | . _ . | . . | . . . _ . | _ . . _ | . or

'EE'

MAYBE 'I'

OLD MORSE 'O'

RIGHT SIDE BLINKS:

_ . . . . _ . . . . _ _ . _ _ . . . .

Possible character interpretation

_ . | . . . _ . | . | . . _ | _ . _ | _ . | . . . |

NOISE

THREE SECOND CLIP

LEFT

_ . . _ . _

_ | . . _ . | _ |

RIGHT

_ . . _ . . . . _ . _ . _

_ | . | . _ . | . . . _ |. | _ . _ |

…_. IS A SLASH SYMBOL "/"

. IS "K" AND ALSO MEANS "OVER"

Mainly, in these clips, it looks like gibberish but maybe someone has more skill decoding hand-sent signal lamp messages.