I know I said 3 Videos, but I found a few more that describe this American Tragedy so well.

One of the best videos to use when explaining to family and friends how children are
BRAINWASHED

Another informative with the late Dr. Jayne Major 
YouTube Description:
When divorce turns nasty and one parent tries to turn the kids against the other. Dr. Jayne Major, police officer Catherine MacWillie, and film director Shelli Ryan discuss parental alienation syndrome.
YouTube Description:
N writes in about his "Malicious Mother" who alienated him from his father for 25 years. He is now in the process of reconnecting with this part of his family that he was deprived of. His mother now has amputated him, heartlessly! This tactic to seek revenge on the other parent is so toxic and so manipulative and has devastating far reaching consequences. It is not to be used unless there is physical proof of abuse. In this case there was no abuse and so the blow was all the more horrifying for N.

This man nails it! 
Youtube Description:
Here i raise the question if Parent Alienation Syndrome is a separate disorder or if it is a behavior of a Narcissistic Personality Disorder. We know that the prevalence of narcissistic issues is high in PAS parents. We also know that up to the divorce this behavior is not prevalent in alienating parents. It is as if the divorce trigger a certain behavior in a personality already disturbed. A normal personality would never expose a child to this kind of brainwashing. 

It is a fact that the features defined for narcissistic personality disorder contains the features described for PAS, but not vice versa. Moreover, it is clear that nobody suddenly get a personality disorder, as PAS is, just because a divorce happens. This behavior appears more as a result of pre-existing personality and manifests itself in this particular way when the particular condition of divorce occurs.
A well done video on this epic tragedy.

Very insightful discussion on Parental Alienation
YouTube Description:
Men's Net TV. Show #145. Parent Alienation Revisited. Host Mel Feit. Amy Baker, PH.D, Richard Smulczeski, Lieutenant/NYC Fire Dept., Jacqueline Harounian, Attorney.