Hen having hard time laying an egg

[Pfau]

I have a wonderful polish hen who loves to come into the house and lay her egg. She’ll stuff herself under some blankets and stay there for an hour or two. However, I’ve noticed she has a lot of difficulty with the process while my other hens seem to not have a problem. I do not think she's egg-bound, or else she wouldn't be laying eggs in the first place if I'm correct. I'm just worried because each time, it seems harder and harder for her to lay an egg. But afterwards, she's completely fine. I attached a video of her laying her egg.

 

[Wyorp Rock]

Watching her may be stressing her a bit, it looks like she likes privacy during her egg laying.

Do you offer oyster shell free choice? What type of feed do you use?

She may benefit from some extra calcium for a couple of days (1/2 tab of Caltrate) and vitamins in her water once a week.
Some hens as they get older can take longer to lay their egg. Watch to see that she is drinking and eating well.
If she is overweight, then cut back on treats since having too much fat in the abdomen can also make it more difficult to pass an egg.