If you are not currently slamming your internet then SQM is not a solution. You should see time out sessions where APPs end if you are slamming your internet. Video slowing down is not necessarily a SQM problem if you currently are not running SQM. Your network only extends to your ISP. Then your ISP only extends to the internet. Then the internet can have slow downs as well. There is a lot that can happen out which is out of your control. Just remember there is not 1 magic fix all. It takes a lot of things to build a good network.