Lyndon McLeod made a 40 minute movie of himself driving his motorcycle, planning his shooting, gearing up, appreciating artwork, and doing random shit while he rambles about Genghis Khan and war stuff in a distorted voice filter.
Khuram Butt was interviewed in the documentary, "The Jihadis Next Door"
Randy Stair did shitty skits and animations (if they count)
Alek Minassian participated in a mock commercial for a school project as a satisfied user of the fictional product, "Google glasses"
Eric Harris and Dylan Klebold would record short films of themselves (Hitmen for Hire, Radioactive Clothing)
Caleb Sharpe would make small skit Youtube videos involving him fighting his friend
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Currently dating Seryu Ubiquitous