I didn't watch the entire video but wasn't too impressed. The women were all young, nothing against young women, but being in my 60's gives one a different perspective of "strong". I'm more impressed by the 74 year old woman that I know who spent her winter here in the mountains skiing and training on a bike trainer then did a sagged cross country tour to raise money for medical research in March. I can't begin to keep up with her on skis. Or the 70 yr old mother I met on Tour de Nebraska riding with her 2 daughters. She not only was a stronger rider than her daughters but sagged herself across country last year.
Our bicycle club has several women who are in their 70's who can "kick butt" on the climbs here while most of the men "whine" about how hard they are.
I also saw a video of a women in her 80's doing a kettlebell workout that I can't begin to replicate.
These woman don't have perfectly sculpted muscles but have managed to maintain their strength throughout their lives and continue to accomplish goals that many young people would deem impossible.