Was she actually serving during Mass- or just setting up for Mass?
It makes no difference, she is not allowed in the sanctuary.
Why is she not allowed to clean the altar or arrange up the flowers?
My mom +rip, born in 1931, arranged the flowers on the altar and around the sanctuary, stripped and washed the linens, dusted etc. throughout her school years.
The video should show the nuns serving if wants to be believed, otherwise, far as I'm concerned, it's a crock.