The guy was wrong. The info on his terminal was a glitch, or maybe he screwed up and spoke too fast not realizing he was perhaps looking at an individual stock and not the SPX volume screen. If that was not the case it would show up on the charts. There's a reason you couldn't find it this weekend on google, because if 40% of the days volume had in fact come in with 2 minutes left, it would be all over every financial website out there.
So once again, before you post stupid stuff based on what you see on YouTube, you should verify that with the charts like any professional would.
You should know by now that I deal in facts, not YouTube videos. Go to Bloombergs own one minute chart for the SPX on 6/23. Do you see it there? No. It didn't happen. Going on about this, ignoring the official tape, makes you look really stupid Stoney.