A plane with landing lights on
Great video. Compression artifacts are significant on night vision IR webcams. Even the bugs leaves a trail
Clues:
Light is permanent on:
Landing lights are not only useful for taxi, takeoffs, and landings, but also provide a means by which airplanes can be seen by other pilots. To enhance the "see and avoid" concept, the FAA encourages pilots to turn on their landing lights when operating within 10 miles of an airport and below 10,000 feet.
Source of information is here:
https://www.inflightusa.com/all-articles/f4gzgr8sr3b9yltopsge12mzrv23e8
Direction of
vlissingenwebcam.nl :
Web cam looking south-east in the direction of Antwerp Airport.
Direction of
webcams-vlissingen.nl :
Web cam looking east in the direction of Antwerp Airport.
Airport:
Antwerp airport landing strip is pointing directly at Vlissinge.
Distance:
The plane would have the light on when it is under 10.000 feet (3.000 meters) and within 10 miles of an airport. The airport is 60 km away (37 miles), so if the plane is under the 10.000 feet level, the lights would most likely be on.
Speed:
Accent speed could be 250 knots/hour (460 km/h). So if the plane is some kms away, it looks about right. Calculations can confirm this, based on time vs angle of view vs anticipated speed = distance to plane. It could also be approaching the airport in a turn, to align with traffic and the direction of the landing strip (north-west to south-east).
Video notes:
When you play with the speed, the path seems not entirely even. It looks like the plane is turning a little to the left away from the camera. Coming up from the left side of the image and doing 2 left hand turns. Passing the area in a left turn.
Best guess:
It's a plane leaving or landing at Antwerp Airport flying below 10.000 feet with landing lights on.
Question:
Does anyone have flightradar24 to check it out a second time?
… the last part of the Twitter video. Looks like a lens reflection but I can't identify the source, so its a guess.