Lara's 277 at Sydney, 1992 :
http://windiescricketfever.mywowbb.com/forum1/6037.html
Even with broadband it takes 3 or 4 minutes for the video to come up.
Imran Nazir's 50 in 14 balls in a 20-20 match :
Link
Wasim, Waqar and Akhtar :
http://www.putfile.com/media.php?n=cricket_clip
Not sure if this still works