I cannot imagine having to watch that sort of videos... Still, a good thing you got to deliver some justice! (Probably, not the sort of justice I have in mind as far as such people are concerned, but still...)
A few weeks ago I wrote about some organizations in the UK demanding that people found in possession of such videos be spared a jail sentence, like it was no big deal... I came to the same conclusion as you - if people wouldn't buy/download/circulate such videos, kids would be spared that horrible suffering. As long as you support in any way such atrocities, you bloody well pay for that!