This reddit thread was posted with the attached video
The claim is that this shows a UFO following a Delta Airlines MD-88 aircraft into JFK at around 1531 on 11/11/2019.
I asked for a location on the reddit thread and was given "Deer Park Ny heading north @ 1531 Another witness in oceanside NY heading North @ 1533"
The claimant also states that this is NOT a air to air refueling jet (as the video very much looks like) The video and claim also focuses on some other "UAPs" which look very much like flies which were not noticed at the time of the video being filmed.
The claim (as is common) states that the UFO went on to perform unusual maneuvers, but these were unfortunately not captured in the video.
Given that there is a video and date/time/location it could be investigated to some degree, but I don't have premium access to FR24.