I'm not quite sure how to fix this. It's a late 2012 cMBP with a SSD, and I run Chrome as my default browser. Any video streaming website, such as Youtube or twitch.tv, runs perfectly fine when watching in non-fullscreen, no matter the screen size, but once it's running on full screen, it just stutters like crazy. Is it a graphical problem? Processor? Internet? It didn't do this before, it just started recently. I'm not doing any intense work in the background either, only iTunes.