Your release doesn't seem terrible, but you could have a lower track because you're thumb is in the ball while you're trying to turn it. The video was real clear, so I could be mistaken. My track can get low when I do that. 

Any turn you put on the ball should be after your thumb clears the hole. 

Where's your oil/track lines on the ball after you throw it?  For a quick guess take a look at the pic, my track lines start at number 3 than it migrates towards & past 1 as it goes down the lane.  If you were a spinner your track would be somewhere below 1, low track around 1, med. 2 and a high tracker 3.  Which one is yours?  Usually if your a high tracker, your release is pretty much up the back of the ball.  But this will give you a quick generalized answer.  For the truest answer, roll the ball and have your track measured by someone who knows how to do it.

 

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