Snopes.com said, "Since Brown's death in August 2014, several rumors have circulated about him that have later been proved entirely false: one involving his supposed arrest record, another claiming he had gravely injured Officer Darren Wilson, and one displaying a photo of gun-wielding murder suspect Joda Cain that was touted as depicting the "real Mike Brown."
Read more at snopes.com: Mike Brown Beating Video

Snopes.com said the video was false and cited several things about how it could not be Michael Brown.

I am not a fan of Michael Brown by any means but less of a fan of posters who go for the sensational without backup citatations.