dude its a light reflection it move farther away at the end causing the shape to change

Looks like a spiderweb or hair to me

A fuking fly get a grip

You don't have to be so ugly .. I was trying to just have some fun. Maybe you should get a grip

A rectangle

"Nobody has any explanation to what it is".....lol come on op

A moth attracted to a light source

I agree with spiderweb comment. I’ve had similar captures on my security cameras.