I've seen this video & it's one of the reasons i came to this forum.
I'm happy with the programme & it's not failing in fact quite the opposite, whilst cutting i'm still getting stronger. My issue really is my muscles just aren't recovering as quickly as they would be if i was on a calorie surplus.
I'm thinking i would be better only training twice a week & doing some conditioning / cardio in between the workouts to give my muscles more time to recover.
Once i've finished with the cut i'll be going back to doing the SL 5x5 3 times a week