To get the videos you want to get, see tips here Movie download issues

As for pedophile stuff, you can report it to bitzi. You can also try to ensure you don't downld it by accident again by following the above tips & also putting words like peda & pedo in your keyword filter. How to use the Keyword Filter. You can also filter out porn by adding the following terms to your keyword filter: Direct instructions to eliminate porn from results

As for reporting ... it depends. If the person has accidentally downlded 2 or 3 by accident like you but hasn't checked them (some people don't check their files for many weeks) then ignore. However, if they have a great long list of such files, then you can report it to the authorities in your local country. Yes authorities do share such info across borders. You can report it here with their ip number: http://www.ic3.gov/ or locally find links here http://www.gnutellaforums.com/showthread.php?t=56949

FYI I recently saw a UK internet research company found that something like 50% of such comes from USA. That's a surprise!