Bro, I'm not doggin' your camera or vid, just so you know. I think it was awesome your wife suprised you with it and I would use it as well. Maybe if you can get some type of chest strap, it would come out better. Even mounting it on the front frame instead of the bars would greatly improve the vid, just my $0.02.
That was shot with the GoPro on the helmet. Search "Oleta MTB" on youtube and you can check out all the trails offered there, there are like 5 or 6 different ones. Also search "Markhem Park MTB (Fort Lauderdale, Fl), they have some cool as trails also. I really like the wooden bridges and the DNA bridge is badass!-----> DNA Bridge