Something is terribly wrong with your 2022 laptop if a ~2h 4K movie can drain the whole battery. You should get the battery RMAd ASAP if it's still in warranty or check whatever energy vampires you might have running or maybe a bad driver setup.

I have a cheap-ass Lenovo Yoga and watching a 4k movie drops the battery only by about 10% per hour, so something is definitely wrong with yours.