I tried to find this after reading your comment and the amount of nonsense AI tornado videos is a lot to wade through. Wasn't able to find it.

This was it on Reddit: https://www.reddit.com/r/mildyinteresting/comments/1t7jlat/a...

Despite the title, the video shows a really strong mesocyclone as there is a break between the cloud and the ground. The funnel might be visible, but it’s not as big as the video makes you think.

This video was a repost btw, it's from 2025:

https://en.wikipedia.org/wiki/2025_Enderlin_tornado#Tornado_...

Orrrrrr, there are always tons of cosmic rays of the type that create lightning hitting earth, there just aren't the conditions necessary for those rays to trigger lightning except for when there's a big storm. I imagine the clouds are a different electrical environment than a regular sky and maybe in those conditions a cosmic rays will trigger lightning. Like a gigantic bubble chamber made of our atmosphere.

Volcanic eruptions are also known to have lightning in the eruption plume.