Technically, all the lightning we see is ground-to-cloud:
“A typical cloud-to-ground flash lowers a path of negative electricity (that we cannot see) towards the ground in a series of spurts. Objects on the ground generally have a positive charge. Since opposites attract, an upward streamer is sent out from the object about to be struck. When these two paths meet, a return stroke zips back up to the sky. It is the return stroke that produces the visible flash, but it all happens so fast - in about one-millionth of a second - so the human eye doesn’t see the actual formation of the stroke”
Source: National Severe Storms Laboratory
cloud-to-ground is rare but does occur.
If the video could be slowed down sufficiently (impossible with camera/phone) and it proved to be cloud-to-ground, what could that mean?
Second point is that it is extremely rare to see lightning take a direct path (straight). And, the angle seems, uhhh, unique.
Juxtapose against the 2 strikes of the Washington monument in the same video.
I wonder what the terminal velocity of a 100 foot rod of tungsten might be if launched from a rail gun in near-zero gravity?
Chaff