I can't see anything graphic; the smoke masks the details.
Of course, that doesn't change the fact that you know what is going on; it's still a heavy video. That would just be my guess as to why it doesn't contravene YouTube's rules.
Did you say this was linked to the Basque conflict? For a minute there I wondered if it was the one in 2004 -- I was in Madrid the very same weekend afterward, and saw Real play at the Bernabeu. The atmosphere was pretty emotional; candle-light vigils outside the stadium, and the minute of silence broken by angry shouts against terrorism.
Sorry to tangent from the topic; it just seemed relevant.
Just a quick off topic here. We were drawn different assignments at school regarding conflicts going on all over the world at present time. Later, we were going to hand in a description of the conflict we drew -- in depth.
I got the Basque Country, and ran over this video I'll post below concerning the Basque conflict, and now I sit again with a pretty simple question. (Watch the video.) How can YouTube let something like this lay on their website as you clearly can see people are dying? I thought that was against their rules?
I mean, there are several 9/11 video's on YouTube, but that's something different. You can't see with your own eyes that anybody's dying by looking at the WTC, even though that's an obvious perception. I was shocked after I watched this video, and wonder what your opinions are given that it hasn't been removed, and was posted over 5 years ago.
PS: I recommend not watching this video if you're a sensitive person. It's some really heavy stuff.