Maybe they want to have your volume turned down but still hear the "bing" over another event. Or any number of other scenarios. Don't assume your video will b

Maybe they want to have your volume turned down but still hear the "bing" over another event. Or any number of other scenarios. Don't assume your video will be the only thing going on or the thing that determines the master volume setting. Finally, if the user wants to adjust volume for your embedded object, why should they have to change the master volume, and then have to remember to change the master volume back, afterward?