I have seen the secret Japanese video. No, not the one where you die within a week of watching it, the other one — the one about how traumatic divorce and parental separation are for children.
Titled "Kodomo no Iru Fufu ga Hanarete Kurasu Toki ni Kangaenakereba Naranai Koto" ("What Couples with Children Must Think About When They Live Apart"), it is a short educational DVD that dramatizes a deteriorating marriage and the effect it has on the couple's elementary school-age daughter.
The DVD's message is quite simple: Parental separation is extremely hard on children, and they deal with it in different ways, ways parents may not understand or appreciate, particularly if they themselves are deep in the emotional swamp of divorce.