That's quite the peanut gallery you've got there.

They sound like a good crew though - get through the ribbing, and I'm sure they're loaded with good advice to share with you.
Couple chunks of advice that you may already know:
1) Slow it down. You were using momentum to clear a couple of those obstacles, that's how stuff gets broken and trails get damaged. You had better lines to take early in the vid that you wouldn't have had to thrash and flail at - if you can't crawl an obstacle, back up and look for another line.
2) Don't be afraid of the ebrake. You've only got two feet for those three pedals, and that can get tricky. If you have to pause in the middle of an obstacle, set your ebrake. Then you can let the ebrake out by hand while while you modulate throttle and clutch, and things will get a lot smoother for you.
3) Another option would be a thumb throttle - I've seen guys make 'em out of bicycle cable and shift levers, that'd let you throttle by hand and use your feet for clutch and brake.
4) Either way, you need to think about 4.7s or duals. The nice thing about an auto for low-speed crawling is the way you can idle up to an obstacle and slowly throttle up until you get purchase. A manual can't do that as well, so an extra-low range is almost a necessity for you to get the most out of your truck.
5) Air down. Don't let those monkeys give you grief about it either, there's no reason to be in terrain like that and not have all the traction you need.