There is no audio portion to the video. But that really isn't needed.
The video depicts a young man, Laquan McDonald, on the ground and being repeatedly shot. The person doing the shooting is police officer Jason Van Dyke. He has been charged with first-degree murder.
It is due to the open records law that this video has been made public. No one can connect the dots on life and death. But, the family of McDonald might feel that, because this video is being shown, their son did not die in vain.
The odds are improved that justice will be done. Also, there might be more justice in general for people of color.