I agree, if it was growing normally.
But whether it changes in the next few days can help establish whether it is growing (but badly delayed, for unknown reasons) or whether it is already dead.
With the photos and the video, it will be easy to compare in a few days. Live chicks should grow quite a bit over the next few days, while dead chicks will not grow. So as time passes, the difference becomes more and more obvious.
If it actually died a few days ago, that would explain why it is...
The most common counting method I see is based on how long the egg has been in the incubator.
So when you first put them in, they have not been in for any amount of time.
One hour later, they have been in the incubator for one hour.
24 hours after they went in, they have been in the incubator...
I count it like this:
10/17 is day 0
10/18 is day 1
10/19 is day 2...
...today, 10/31, is day 14
It might just be developing slower for some mysterious reason of its own.
But is there a chance of the incubator having a cool spot? Cooler temperatures definitely can slow down the development of...