السلام عليكم ورحمة الله وبركاته أحسن الله إليكم How should we advise elderly family members who watch dramas with music , etc..?

With wisdom, kindness, and beautiful words, and without nagging them. You should also be wise regarding whether they will listen or not. If they are not going to listen and only more evil will result from it, do not advise them.