I was curious about the differences between the blu-ray and the video that was uploaded a while ago, so I watched them side by side.
First off, disc #1 of blu-ray is 2:36:16, and disc #2 is 49:07. The internet video is 2:48:35. So about 12 minutes missing in the blu-ray.
At 1:19, its missing the part where you see the sign showing Nicole dancing to "I Love It" by Tyler Van Den Berg (about 3 minutes)
At 1:36, they cut out 5-10 seconds of dead time bfore the drummers came out
At 2:22, they cut out about 2 minutes of dead time.
At 2:30, they cut out the KARA animation trailer (about 3 minutes)
At the end, they cut out 4 minutes of credits.
Its kind of difficult to get the two videos in sync, but I recommend watching them side by side since the cuts are usually quite different. The blu-ray version seems to have more close-ups, although they seem to be digitally zoomed (i.e. fuzzy)