Your gaming is coming in as encrypted https traffic. This is
scenario (3) I mentioned in my previous post with “Web” being the destination.
As to why streaming is lagging:
1) Your streaming video and the game download are both be identified as "Web" and then they are fighting each other for bandwidth available in the "Web" category.
OR
2) You have a low total download. With this script, if the video is properly identified as streaming, it should have 30% of your download speed always available (reserved) for video streaming.
What is your total download speed, and take a look at where traffic is going in both "App Analysis & QOS Statistics"