A., I feel for you!!!! I have almost 10 month old boy/girl twins.
Step one -Mommy needs a break, a calm Mommy handles screaming babies better. Call for reinforcement. Family, friends, and I joined Dupage Doubles for Support, too. Get the heck out of the house. My Dad comes over with so much patience for the babies. (Because he is not in the thick of it all the time) After an hour at the grocery store or something I feel like a new woman. It doesn't take much, but I know I need to remove myself from the situation every now and then for perspective.
How are the babies sleeping? Are they getting their naps and sleeping through the night? Maybe they are overtierd and thus overstimulated by everything becasue they need some sleep. Don't be afraid to let the babies cry for 10 minutes. I put my babies down in their cribs and go set my kitchen timer. Most of the time by the end of the 10 minutes, as hard as it is to listen to crying, my twins sleep.
My kids love TV, too but I do limit it. What about playpens with a few toys for safe independent playtime? I put my kids in their own playpens while I take a shower, and have 15 minutes or so.
I know sometimes it feels like their is not enough Mama to go around with twins, but try not to feel guilty. Kids at 6months can usually be redirected to a new toy and distracted.
I read the notes about going to the mall. My babies do well with a change of scenery, too.
Good luck and hang in there!! It does get easier!! If you need anything, don't hesitate to e-mail!