Excessive buffering is the result of poor connectivity. Streaming video is especially susceptible to congestion-related problems. You may be able to improve playback quality by making some buffering changes within your player:

Windows Media Player

• Click Change Settings , located on the Windows Media Player toolbar.
• Select your Preferred Streaming Speed from the pop-up. Choose between: Dial-up 56k, Low Broadband 100k, Mid-broadband 300k, or Hi-End broadband 700k
• Click Accept Settings
• There is also a "Full Screen" function on trailer player toolbar for Internet Explorer.