im not an expert but it seems you are REALLY stiff and are putting no effort into turning and stuff but just lean the bike more in turns lower your seat sit low and almost be limp so the bike moves more and you dont keep it stiff
uhm... you can pedal! Your going WAY too slow to turn properly! get off the brakes!!! that trail doesn't look too fast, get going to more like 10-15 mph and pump like a mofo over the jumps and rollers.
Much improved, you look much more comfortable on your bike now, really good.
Now put some power on those pedals and clear them jumps!
Tip: pump up the take-off by pushing through with your legs and get the bike level in the air. When you get level you should start to feel yourself almost falling forwards so you land both wheels at the same time on the landing, or even front wheel first on the jumps in the video.
I'm scared of anything dirtjump like, that steep lip scares the hell out of me. But the DJers call me crazy doing a 20 foot gap (only get about 5 feet in the air)
I am gaining confidence on the steep lip stuff though. Most jumps it's all about hitting them with confidence, physics will do the rest.
Vast improvement speed wise! keep it up! on learning to jump i found the best way is to start bmx... i used to be exactly like you, very stiff, but the i swaped the 26" for a 20" for a year and i wasnt even riding dirt on my bmx just street you might think what the hell has bmx got to do with trail riding.... well in truth nothing but it vastly improves your skill and confidence on the bike i found this out when i once again swaped 20" for 26" and now im prity fast on my bike and im not afraid to try things. oh yeah and competition is basically a very fast way to improve your skill, find someone who is roughly the same skill as you and then when he learns something new you will be inclined to try it!
Cheers, yeah, i have been thinking bout that... i'll have to see how things go before getting a bmx... will definately find some riding buddies though, will make it more fun