[1] appears to be a spider or some kind of bug, suspended by a web or fiber. It's really close to your IR leds, what's why it's blown out in white (overexposed)

[1] appears to be a spider or some kind of bug, suspended by a web or fiber. It's really close to your IR leds, what's why it's blown out in white (overexposed) and casting a shadow into the distance.