Please help me find the creator of the original video! I dmed

Help me Find out what movie/show/video this gif is from??? Pleeaaassse?!

Help me find the original source to this video!

Help me find the original source of this video

PLEASE help me find the background song used in this video! Details

help me find the longer version of the video or the news article

Help me find the origin of this video

Please, help me find the source of this GIF, should be a music

Help me find the source of this gif, it should be a music video

Help me to find source of this video

i need help finding the song used in the video (tw:gore)

does anyone know this guy and what school shooting this was?