You think that's fun? After everything they went through, the physical and mental trauma, you think that getting a partial recovery is fun? Those poor people suffered so that for dumb, ignorant, people like you and whoever it was posted the video to come along and mock and deride them in the name of fun. Is it any wonder the world is in the state it's in now!
That's completely separate, they fought to stop the persecution of innocent people and massive genocide which left unattended would have caused worldwide devastation. The decay in societal norm and an attempt to lighten the tone of psychological neurosis was going to happen whether they fought or not. Do you think hitler was going to stop if people in other countries decided not to join the war, and think for humanities sake? Absolutely not, I hate to say what they did was crucial and such side effects as seen were common, but if they hadn't prevented the takeover we would all be in a much worse place for those that would even have survived. Besides the beauty I find in this video is not only the brilliant effects of just a day of treatment on these men, but the true joy of reaching near "normal" when it comes to movement in gait and facial expressions. Mere hypnosis and basic psychological profiling had amazing results and are still used today thanks to what these men fought for.
Not to mention that a WWI Brittish Army diagnosis for PTSD was cowardice and the "treatment" was firing squad.