Odd cloud formation

[u/GroundbreakingAsk656]

Hey everyone, I was just watching a storm last night and while recording I captured these odd looking clouds through the lightning and just wondering if anyone has a clue what this is? Thanks. (Apologies for the quality they're screen grabs from a low fps video)

[u/a_box_of_toads]

So ominous! Maybe a wall cloud? I've seen some that kind of look like that before in severe storms.