The sort of socialization experienced by boys as demonstrated in the video are couched in contemporary language, but this type of socialization for males is incredibly ancient, probably existing long before we could even be called hominids.The value in socializing men to have reduced empathetic behaviors to one another is that they will be better able to kill or injure other males without remorse or with minimal remorse, a useful capacity when under harsh survival pressure and in fierce competition with other species. A male needs to be able to do horrible things to others in order to protect his mate and his children under those sorts of conditions.
As a disclaimer, this is not to be mistaken for maligning my fellow hominids of past ages; I'm well aware that without doing those terrible things needed to survive, I would not be able to sit here in my comfy folding chair in reasonably comfortable temperature conditions writing about this. The suppression of masculine empathy made a great deal of sense in the past, though it was obviously not without cost. Males with little to no empathy can turn on those they are supposed to protect, become abusive to their mates and children, and even kill themselves. The examples of these problems in contemporary human societies are far too numerous and obvious to list.
To contribute to the betterment of our societies now that many of us no longer operate under quite the crushing survival pressure experienced by our ancestors and in far greater proximity to others, it would be wise to socialize males in a way which fosters empathy rather than discourages it.
Unfortunately, in some cases we are just finding new ways to suppress masculine empathy. For example, the typical male expression of compassion is the protective instinct. This has come to be viewed as a negative behavior by those unable to distinguish between protective behaviors rooted in natural empathy (or internalized altruism) and protective behavior rooted in unhealthy possessive attitudes. By stigmatizing it regardless of the roots of the behavior, we are in effect providing a negative incentive for men to be compassionate even where it would be beneficial.
And because we frequently make no distinction between positive and negative motivations for protective behaviors when socializing males, it's extremely difficult for them to understand what behaviors are acceptable and why, making it likely that they will simply reject the stigma wholesale rather than arriving at a principled conclusion about what sorts of motivations are appropriate for their behaviors toward women and what sorts of motivations are inappropriate.