Is she in some discomfort?

[WildFlowerBees]

I have a camera for our hedgehogs, I charged it but left it on the spare room windowsill, both our cats love their day bed and often sleep in there. I've seen on the camera just how much one of them moves about. Both are 13 this year, I assumed they slept a lot but girl cat is getting up between 20-30 mins turning around and going back to sleep before waking again a few mins later for a wash a sleep then another turnabout.

At night she sleeps with us and despite our king size bed makes it her business to stretch out full and spark out until the morning.

After seeing some of the video clips over the past few days I'm wondering if this is normal behaviour or if perhaps she's in some discomfort?

I'm no expert but in my experience cats sleep fairly motionlessly for long periods of time. They are good at hiding discomfort too, apparently, because it would be unhelpful to show vulnerability in the wild.
I'm sure there would be other signs though I'd there was something wrong with her.

Getting up to change position every 20-30m does seem a bit much, a check up wouldn't hurt...Vet can check for arthritis etc

If she sleeps flat out overnight I wouldn't worry too much about it, but maybe mention it at her next check-up so they can check her over for any pain.

One of mine has always been a restless sleeper during the day.