I have a base model 2011 Mac Mini with 8 GB of Crucial Ram and a Thunderbolt Display. If I install Click To Flash and try to watch a YouTube video at full screen the video stutters so badly I can't watch it. I have noticed that the default settings in Click To Flash is to play the video using the HTML 5 video at 1080p. I have adjusted these settings, but it still stutters. I can play video at full screen with Click To Flash turned off or the flash version at 720p or 1080p with no stutter. I am getting 6 Mbps down load speed on my internet and my monitor is connected to my Mini with the Thunderbolt cable from the ACD. The only way I have been able to get rid of the stutter is to play flash video's. I prefer the HTML 5 version because it takes out all of the adds and other stuff, but I can't watch it. Any help would be appreciated.