I really admire and appreciate all who share and leak these videos etc.
Its not surprising though that it can be done, as the information often passes through SO MANY hands.
For instance, when I was an MS, the CO came to do his visit, and there was a video he was to show to the Elders and MS only. (It was that appalling video on the elders counselling the sister who lost her husband in death and felt suicidal)
Anyway, he gave me the flash drive of the video a few days before the meeting so I could set it up in advance.
There was nothing stopping me from copying it and distributing it worldwide if I chose to.
So, I would say that poor procedures is one main reason things get out.