No idea if you were serious or not, but I have heard others make similar remarks and have seen a couple tickers go south after one of his chart videos so I was curious enough to do an (unscientific) check.
I searched youtube for his past charts of FNMA and checked whether the closing price on the following trading day was higher/lower/flat (counting a penny or two as flat) than the close on the day the video was posted. Note that I was not checking for whether his TA held up - it could be that every time he said the chart looked bad it went down, or it could have been the opposite. Only checked whether the mere existence of the video had any correlation to price action (presumably because it was some sort of signal to short).
No correlation at all:
Date - Close on following trading day
10/23 - lower
5/24 - higher
11/8 - Flat
10/3 - Flat
8/5 - lower
7/8 - lower
10/24 - higher
5/20 - higher
10/30 - higher
So no, apparently I didn't have anything better to do with that fifteen minutes of my life than check a silly hypothesis, but here you go in case anyone else was a little curious.
News 
Market Data 
Discover 
