YouTube keeps deleting evidence of Syrian chemical weapon attacks

"However, a video for example showing Isis recruitment can violate the law in one context, but also be legal and important for purposes such as documenting crimes for future prosecution, says Daphne Keller, intermediary liability director at Stanford's Centre for Internet and Society.

“The more we push companies to carry out fast, sloppy content removals, the more mistakes we will see,” Keller says. She thinks lawmakers should “slow down, talk to experts including both security researchers and members of the affected communities, and build on that foundation”."