it looks pretty solid for 8 months worth of bowling. head is over the ball in the start, decent pace to the line, slide and knee bend is good (from the back angle). With a better lit background and a side angle shot, I could give you better advice. However, I would work on the follow through. Its seems as if you are trying to place the ball onto the target instead of allowing the ball to come through the swing. You lose leverage, momentum, rev rate, and speed that way.
Get a few more better lit shots from the back and side angles, and I'm pretty sure I can give you more info.