I remember watching this many moons ago and thinking how afraid the child was, that she felt compelled to hurt others to numb her own pain. Completely detached from other people.
I just rewatched it and can pinpoint the part where i realised where she was at psychologically- in technicolour, it was how she described the birdlings, as the mother not wanting them if they had been touched and not coming back. This is so apparent to me in connection with how she felt about her own (birth) mother. And that she killed them seemed significant in that she thought them better off dead.
Of course this does not excuse (merely gives reason to) her behaviour and she absolutely needed to be away from her brother whom she was abusing. I do hope he also had therapy, familial abuse tends to work itself out in patterns.
I looked her up and found that she is an advocate of the therapy she received, aparently adopted by the woman running the project (in the vid).There sems to be some dissonance with weather this therapy is/can be successful...
Anyway, a more modern picture of Beth
I wonder how she reconciles it all, i can identify with having to forgive yourself in order to move on in life.
I wonder if she has had or will have her own children.
/tuppence (for now)