Shapes behind closed eyelids

So, I’ve known I’ve had aphantasia for a while now, nothing new there. However, I’ve made yet another discovery today that people even close their eyes and, without imagining things, see static or a pattern similar to the bottom of a pool, moving. Now, it was a video and obviously commenters aren’t always experts but in the comments people were saying it’s because light filters through your eyelids and the little veins and your eyes are just processing that. But if that’s the case…why can’t I see that? So I was just curious if anyone else sees this or if it is just complete blackness like what I see. Just wondering if it has to do with aphantasia or if my eyelids are just..thick or something. Now, I do have kind of blurry vision but I see light just fine.