A qualified instructor really is the best way to fix your issues (I'm not one). Make sure you take something to write with, because the notes you take will last you far longer than the memory of what they tell you. maybe even a camcorder.
First thing I noticed was your wrist angle. Second thing was, it looked to me like your footwork was off. believe it or not, your upper body fundamentals could be perfect, but it's your feet that sets it all up. if your feet are off, the rest of you is off. look up the forcefollow video where greyghost is talking about fundamentals. that's a great video. also look up the john schmidt instructional series where he talks about his pre-shot routine and chalking. there's a lot of good info there, he discusses "dropping" into the shot and lining up before you even get down to shoot. definitely not the end-all, be-all, but very important things when building your overall game. that's just my input, for whatever it's worth. as stated above, a qualified instructor is the best way to diagnose your ails.