@Mattific is right; Lynda.com has a wide range of tutorials. However, they require a subscription. If you're just tinkering around, a search in YouTube is usually better for the casual editor.
Editing looks good, nice and clean. For the photos, try using your editing software to zoom in and get rid of the ugly black bars on the sides.
Personal preference: I'd leave the music out of it. I'd rather hear the hum of the engines and reactions of people watching than wonder why it was all drowned out by some tune.
As far as shooting goes,
try to get close to the action without putting yourself in harm's way. As a lot of what you guys were doing was high speed stuff, it's difficult to shoot something like that while getting close. The best solution there is to snap up a cheap, used GoPro camera with an assortment of mounts and experiment with them.
You can get awesome deals on older HERO cameras through eBay. I've even set my HERO camera in precarious positions and walked away from it, letting Jeeps roll right over!
This is a video I did a few years ago (okay, seven years ago) when I first got my TJ and it was completely stock. Yes — I realize it goes completely against my "no music" suggestion, but it was my first video.
As an aside: there are
so many videos out there with nothing but a shot of the windshield and hood because people are so afraid to lose their HERO camera. That's B-O-R-I-N-G. It's like duct-taping your passenger's head to their headrest! In order to make an interesting video, you cannot be afraid to lose it! The GoPro app has a function that will force the camera to beep constantly until a button is pressed on the camera. That way, if you lose it, you'll be able to hear the beep and easily find it.
Any other questions, just ask!
Source: am professional videographer/editor.