Running Form: Biomechanics, Efficiency, or your own "Authentic Run"?

I have a half-marathon coming up in 6 days, and my knee hurts today. I just figured it's from propelling my Clydesdale body around for 8 miles on Saturday. My marathoner-wife says, "I think sometimes you over-pronate, and you crossover the midline." (I just think I'm too fat still)

She sends me this L-O-N-G- but very interesting 12:44 min video.

Watch at least the first 5 minutes, where they dissect and critique the running form of superstars Ryan Hall, and Meb, and contrast them vs. the revered "Kenyans". Also, the animations are quite amusing too. Near the end, my attention span started to wane, my eyes glazed over, and I got the feeling they were selling some snake oil. But, the first 2/3 of the video was pretty fascinating. I think I do all these mistakes.



Here are my fast-n-dirty calculations:

1 marathon = 26,200 strides (multiply times each inefficient factor, like "Bounce/Drop")
(so, luckily, that's only 13,100 strides for my upcoming Half-Marathon)

For Ryan Hall:
1 marathon = 26,200 strides X an inefficient 4" bounce drop
= additional 3.3 grueling extra miles
= 6,812,000 lbs added impact

For Me:
(I figure I'm about 100lbs heavier than Ryan Hall)
= about 12,052,000 lbs added impact!!

No wonder my knee hurts!

I've seen marathoners like Ryan Hall run, and they look like awesome speedy gazelles to me. But, what the heck do I know? Is there truly one "perfect" running form? The concept of efficiency makes sense to me. It reminds me of the endless arguments for/against the "perfect golf swing". Or.. does everyone just have their own unique, Zen, discombobulated-but-works, golf swing? If anyone has read the book or seen the Will Smith/Matt Damon/Charlize Theron movie, "The Legend of Bagger Vance", you'll know where I'm coming from.

"Yep... Inside each and every one of us is one true authentic swing... Somethin' we was born with... Somethin' that's ours and ours alone... Somethin' that can't be taught to ya or learned... Somethin' that got to be remembered... Over time the world can, rob us of that swing... It get buried inside us under all our wouldas and couldas and shouldas... Some folk even forget what their swing was like..."

- The Legend of Bagger Vance

Does the elusive perfect golf swing or running form even exist? What do you think?