"Oh, my hip!"
This looks very bad to my young eye. Fingers bent backwards supporting the entire frame?! Never mind going over in more of a somersault roll rather than (what I know to be) an aikido roll. These are some tough seniors. I wouldn't recommend my parents joining this class.
I, of course, applaud the interest in bettering yourself in any and all aspects but I would think the older beginners should approach with more caution as injuries would likely take longer to heal from.