So she insists she believes the word says the world is spherical but that there is a dome in the sky. I think she got bored halfway through the video after they stopped talking about the stuff from the bible. I see that the firmament is real but as someone who was raised catholic I assumed all religions agreed that it was a metaphysical barrier between heaven and earth. After reading through the comments here I feel like she probably got this from YouTube/ticktock and not from her church.

To be clear I couldn’t get a hit on a religion believing it is a solid impassable dome in the sky. I got hits on flat earther crap that sadly I knew about because another family member was a full fledged flat earther… (These are all in-laws BTW). I also found the bible definition which only states that the firmament is a barrier between heaven and earth. I am mostly just trying to figure out where she got this nonsense from and I suspect it was going down a rabbit hole on YouTube that led to a flat earth video using the bible as evidence of the flat earth. She has a short attention span so she probably stopped paying attention after the part where they said the sky is a dome because she said the earth is round.