Im trying right now to watch some tutorial videos on You Tube. They are slow to start and then pause, run short time, pause again with a spinning wheel the entire time. And then some videos run smoothly from start to finish. I did not notice this before the latest 6.1 upgrade. I double click my Home button and close all open apps but that doesnt help. I have an Ipad 4. Is there anything I can do, change a setting, maybe or do all Ipads do this?