Samir: the video, even in this edited version, is extremely upsetting and I could not bear to watch more than a few seconds. I do not see why you mention racism in your post, as animal cruelty goes on all over the world. It is not restricted to one nation or race.
You have written that "the local law is lacking". What exactly do you mean? That there are not suitable laws against animal cruelty? Or that there are such laws, but the police were unwilling to prosecute?
If it is a case of the laws not existing, then there is little can be done. Strong pressure needs to be applied on the government in that country for new animal cruelty laws (the video does not state which country this happened in). Or if the laws do exist but the police wouldn't do anything, then perhaps an appeal could be made to police headquarters about the inaction of the local police force, attaching details of what happened, the names of the perpetrators and some photos.
If all else fails, perhaps the local newspapers could be informed (with photos).