Start with getting a series of lessons from a pro (start with 4 and then evaluate yourself AND the pro). It is probably the best approach to an overall improvement plan you can make.

Going to this site here or that sight there, reading books and getting different advice can help in tweaking, so only do that after you get on a good footing from one source that is worth the money (maybe $200 US total).

Not the advice you wanted I think, and I usually don't just say "See a pro", I give the advice to those that need it...your problem is that if someone was to actually give you all the advice you want, it would take days to write and read, cause all sorts of discussions amongst the great patrons here and you would not be any better off...only entertained (assuming you like this stuff). Watching videos is ok if you have something specific to look for, and posting your video for others is not always the solution as you will get good and not so good advice. Reading these topics in this fourm is good for having lots of details in general areas is, but again, not always the best way to get you back into a solid foundation, it is a little risky if you decide to go down a path that breaks what was actually good in your swing to begin with...see what I am saying?

So the good pro will instantly see what you are doing good, keep that, and focus on the part that you didn't know was broken....it's that easy. Your time well spent, and a near guarentee that you are going to see improvements.

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I'm a golfaholic, no question about that. Counseling wouldn't help me. They'd have to put me in prison, and then I'd talk the warden into building a hole or two and teach him how to play. ~Lee Trevino