First of all Youtube asked me to confirm I was 18 (which I thought was weird); the video started out pretty normal, so it made me wonder why. Then I noticed the name of the song. Although I don't remember it, I know it was something pretty disturbing: something like "I want to drink your blood" or something gory like that!
I took my eyes off the screen for a while and when I looked again I was shocked; the singer was covered in blood. The video had good production values, and you could tell it is fairly recent, might be from the last two years.
All I remember is that it was sung by a blond (?) girl and that it had a pop-ish sound, thus the weird reaction to the blood scene! Sorry, that's all I remember! Thank you for your time!