They have footage of that collision. In color.
Hope they included the 7.1 surround audio for full effect ;^)
“They have footage of that collision. In color.”
Some of the light emitted from the collision still exists and is still traveling through space about 4.6 billion light years distant from us. If it were possible to collect that light in an observation instrument and resolve it into an image, you could still quite literally make a video recording of the event, and then bring it home to Earth using a transport method that does not require FTL (faster than light) travel such as an Einstein-Rosen Bridge.