Practices that forge the body also change the mind.
One of the main ah-ha moments that happened to me a couple years back when doing a program on the Brain and Reading was the fact that when you learn something, anything, you change the wiring in your brain. That wiring can change temporaily or long-term and often-used circuits get insulated so they're work faster.
So in the video there are things that are about increasing strength of body and others are about an increase of spirit or determination.
If a few whacks with a stick keep you from taking pills for depression or allow you to live in greater harmony and persistence outside the training hall - then dojo-only could have major benefits off the floor.
I've grabbed Heather more than once for a theraputic round of conditioning after a particularly stressful workday.
However, if you're doing that kind of training with little or no understanding of possible consequence and getting injured on a regular basis to please a teacher or seek acceptance among a peer group - then the training is obviously detrimental.
That's why I try to be particularly mindful of new students during conditioning drills. A sudden change in the color of their face (really pale or really flushed), a major change in breathing pattern, a look of fear in the eye...
We do the training to build people up, not to break them apart.
Did you show compassion today?