With Flash uninstall. Clear cache then reboot. Go to Google store and go to my apps and reinstall flash. Flash will no longer be in the store. I did this today and was able to watch YouTube videos. When on background restriction I notice it doesn't play well. When not on restriction it plays. Hopes this helps someone. I'm new here! I frowned upon the Maxx because was only getting short battery life on LTE. I do use heavy usage and With ICS you should expect heavy drainage even on restriction because of the new OS .
After finding out the 3G code *#*#4636#*#* I've been somewhat happier. I was expecting legendary battery life. God bless hope my post helps!
I was also going to post fox fi help but I forgot now lol sorry!