What is the best way to fill a space with water?

Hi,
I’m trying to recreate something like this video,

in order to fill the room with water. Granted, I’m still a beginner and am not expecting to make the most realistic water right now. I just need to know the basic components that go into this. I am also not aiming to distort camera feed in order to make people/objects look refracted. I will try that when I develop more skills. For now, though, can anyone tell me what are the basic steps for making a room appear flooded, as in a few feet of water on the ground?

Thanks!

A plane a bit higher than your ground floor, with a semi transparent shader on it?
Then enable depth occlusion for it to occlude where real objects are

For the water visual itself, I made similar effects by working in URP, and then make a water shader graph and use the opaque texture to do the refraction. Quite some guides on how to do this online

Thank you! This is helpful