A user named MeTaLhEaD696 is posting propaganda videos on YouTube.com showing terrorist kill solders. These are videos of sniper shots, IDE's and other methods.
To help remove them you can go to www.youtube.com and do a search for MeTaLhEaD696. When you find his terrorist videos you can click the "Flag as Inappropriate" link.
From his posts you can find other people posting similar videos and have them marked as inappropriate too.