Wow. I just retried your link, but whittled it down to the root and then navigated to the Savitch clip. I don't know about all the effects of coke, but this isn't what is usually portrayed on the screen. Her thickness of speech seems more like drunkeness or even a mild stroke. Here eyes look terrible. The site mentioned that her death occured 20 days after this broadcast and drugs were not involved. I wonder if there was some undiagnosed medical condition which would shed light on her tragic life. Poor woman.
Glad you eventually got the video to load. I watched the video again, and you're right -- it does appear/sound more like a mild stroke than drugs. From what I remember, Jessica died in a car accident (she was a passenger; not the driver). It is sad, indeed.