If the material you're trying to watch frequently buffers, it means that you're not maintaining a fast enough connection to our servers to watch our content at the speed you selected.

UFC Pay-Per-View requires a minimum connection speed of 300kbps to watch video. On the bottom right of the player is the "Video Quality" link. Clicking it will present you with the different bandwidth options available. Selecting a lower speed than the currently displayed speed will restart the video at a lower bandwidth setting. This should reduce or eliminate the buffering.