Monitor 1: 1920x1080, 120Hz, ASUS VG248
Monitor 2: 1600x900, 60Hz, Spectre E20
When I play a youtube video on my main monitor it will endlessly buffer. If I scroll down to the comments so that only a part of the video is showing it will instantly play until I scroll back up, where it will instantly buffer again.
If I move the same video, at the same quality to my second monitor it plays flawlessly. Move it back and it buffers.