That's quite obviously a piece of red cloth or paper...not supposed to be blood, doesn't look like blood, and not claimed to be blood. YOU (or at least first, the makers of that video) claimed that.
Which makes my point. Conspiracy theorists have an enormous double-standard on how much evidence is needed to affirm an 'official' story, as opposed to how little evidence is needed to conclude, 'Giant conspiracy complete with paid crisis actors'. How about taking that skepticism and applying it evenly to both sides?
I didn't watch the Fox News one yet, but I have no problem with the idea that ISIS would use beheading videos as propaganda for their cause.
So, remember what I pointed out in my now locked thread about conspiracy theories...the biggest indicator of believing in one is believing in others. It's a worldview moreso than it is a reaction to one particular event. Earlier in this thread, we can see a quote that lumps the Boston Bombing, Sandy Hook and Aurora events all in the same category...False Flag. It's merely making every major atrocity fit the narrative, after the fact. Confirmation bias.
Btodd