I went away and thought about this overnight, and have a few more points to make.
Firstly, with regards to 'keeping children in ignorance' - Chiabom - do you really believe that pornography is the best vehicle to educate children about sex - either the basics or the wider world of fetishes etc? Because I emphatically do not believe it is the best educational material available. If someone I knew wanted information about a particular fetish, I would direct them towards the reputable support sites on the internet, and the books that are available, so that they could get sensible support and information.
For example, the doctrine of 'Safe, Sane and Consensual' is central to the fetish community - a person has to consent knowlegeably to what they are going to do, and can withdraw their consent at any point. I haven't seen 2g1c, but doubt that it explains this to the viewer. I also doubt that it examines the risks inherent in the activity portrayed, so that anyone seeking information on scat play can make an informed decision on whether or not to proceed.
There is also the issue of childrens' safety, and how this particular video could have damaged children. Firstly, I do agree with those here who believe that most children are not emotionally ready for such information/sights, and that it will give them a very skewed view of sex that could damage them. I do also believe that viewing that video could be very upsetting for a child and could cause lasting harm.
I think it is also very important to consider that this is a very unsafe area for a child to be in. A child who is looking at this video is not going to have found it in the 'Fluffy Bunnies' section of YouTube - they are going to be delving into a section of the internet where there is a lot of scary stuff - serious hardcore pornography involving bestiality, sadomasochism, rape etc - and importantly it is also an area where the adults who enjoy such things are likely to be.
I would not send a child into a cinema where a group of adults were watching hardcore pornography - I would think that would be an extremely unsafe place for a child to be - and I do not think that the corner of the internet where such things are enjoyed is a safe place for a child either. Sending a child searching for 2g1c is sending them into a virtual world full of extreme images and the people who enjoy them, and is most definitely not a thing any loving parent would do or be happy about. When you are a parent, you may understand this better, and I'd be very surprised if you were this blase about your own darling daughter being exposed to this world.
I know people in the fetish community - some are very close friends - and none of them would endorse children being exposed to the fetish world and its practices. Their websites are very vigilant for any hint that someone underage has joined, or for any mention of underage people, even in someone's account of their own development of a fetish. The fetish community is aware of the risks posed to young people, and are vigilant against their presence there, and I think that you, Chiabom, should consider that fact.
I am not surprised that you find it hard to understand why parents are so emotional about this issue - you haven't experienced the surge of protective impulses that fill you when you become a parent. We know we have to allow our children to take risks - even learning to walk involves letting your child risk falling and hurting themselves - and throughout their childhood we are constantly adjusting the balance between wanting to protect them from harm, and allowing them to take the risks that they must in order to grow and develop. A parent will understand the mum who stands at the window watching down the road for her child coming home, the first time they've been allowed to walk back from school on their own, or who has their heart in their mouth the first time their child tries to ride a bike unaided.
We get pretty good at judging what is and is not a neccessary risk for our children to take, and making ourselves let the child take those neccessary risks - and importantly, we are also pretty good at deciding what risks we don't think our children need to take, where the dangers are too great and outweigh the negligible possible benefits to the child. As I have already said, I don't believe that 2g1c has any educational benefits for anyone wishing to find out about scat fetishes so I do not think that there is any benefit that outweighs the risks to a child of being drawn into that dark world.