Video: Fine, book binding would only be a great stress reliever if you were as good at book binding as Armando Costa and Florindo Simões are, but then if you were, you’d be a professional book binder and it would be your job, so it might even be the cause of your stress.
Still, just watching them go about the process of making sure every page is stitched and glued together perfectly and seeing them attach the cover by hand is pretty darn therapeutic.