Errors: (1 critical)
Warnings: (1 non-critical)
Passed: (2 passed)

Browser
Safari 9 100 %Operating System Test Incomplete
Speed Test Incomplete
Adobe Flash
Not Installed0%Isp Test Incomplete
Site
youtube 71%youtube

The content of the website containing your media has direct affect on the performance of it's playback. The presence of too many graphically intensive components like advertisements or other videos can dramatically reduce the responsiveness of the media you choose to view.
71%
Buffering
0 Buffering Events 100%Buffering occurs when the media you're viewing has played out faster than your device can download it, causing it to stop and wait for the next chunk of data to become available.
Buffering is an issue specific to your internet connection, and not the speed or capability of the device you're viewing on.