I'm not sure a couple of blurry pixels zig-zagging occasionally across a shakily-held video
Do you realize HOW MUCH CCTV is at Heathrow. This is not Gatwick where the runway is in the middle of a field. One of the runways is BEHIND Business T5, Long Term T5, Enterprise and other car rental car parks. All of these have CCTV coverage which as a side effect also covers the runway behind it. The other one is adjacent to various repair/engineering facilities with coverage as well.
So if there will be footage it will be anything like shakily held.
I am calling a mass psychosis bullshit on this one or someone about to miss his flight and doing an "exam bomb". This time. There will always be a next time.