I am a big movie fan and therefore like to watch movie trailers. While watching them on my new 2013 refurb the videos stutter at least a few times during a 2:20 movie trailer. I checked and it is also happening on my previous MBA, a 2012 with 4 GB RAM. I'm guessing it's more of a software than hardware issue but can't determine how to fix it. Any help would be greatly appreciated.