I don’t have any reliable information about where this video is from.
The video shows an apparent street fight between two young men that quickly progresses into a vicious machete murder after one gets knocked down. The attacker keeps repeatedly chopping at his head and upper body with full force as seemingly epileptic woman with the camera squeals like she takes it up the pooper for the first time.
This happened in Balsas, state of Maranhão, Brazil. The dudes reportedly hated each other for a long time. On that day, they were both drinking in the same bar and started to fight despite no apparent provocation.
Props to Best Gore member @13lunt420media for the video: