The link for your video is dead.
I don't believe not talking about it is a solution at all. This video was in one of the other threads.
https://www.youtube.com/watch?v=NLdVztcWJDo
The guy showed his gun because he was scared of the black guy approaching him. That is the undercurrent of racism that exists. People learn to be racist and it's passed down from generations. On the other side, fear and anger from being discriminated against is also learned and passed down through generations.
If nobody ever talked about any of this, slavery would still exist.