It used to drive me crazy when I was a kid and stayed up late to watch movies in the livingroom when I was supposed be in bed. I would carefully set the volume down low, so my parents wouldn’t hear, then a commercial would come on at 10,000 decibels. I’ve read that they were supposed to make a law against that, but it wouldn’t surprise me at all if advertisers just ignored it and entered the fines into the cost of doing business. I imagine that if you had a film editor software program with a multi-track audio editor, you could lower the volume on certain tracks, but I doubt you could do this in real time streaming or off the TV. You’d have to download the film onto your hard drive then load it into the editor first.