So I've had Apple TV for over a year now and I've been using it to mirror my desktop and watch videos I have on my Mac mini onto my HD tv. I noticed recently that all of a sudden the videos play blurry when using the airplay to my appletv. I went back to videos that I've already watched via airplay and had never had a problem with. Now they all show blurry. I've tried a different HDMI cable and I can't seem to identify the problem. I've opened the file with Quicktime player & VLC all produce same quality. Any other suggestions?