First, you have a fuckton of sacrifices videos, check blog del narco or ask your local spic, then you have even worse things, but they are labelled as cp, ask your local LEA. Second, the thing with those pics are more or less common in south america, haitians use them (if do you want i can tell you were to ask for some, i wouldnt gonna upload them) they are related with a flavor of brujería or satanism, castellano is obligatory.
For the last point, i never watched that, but for the depiction looks like a blood libel like in old texts (that are obviously fake, that shit never happened ever).