The easiest way to get varying perspectives with a single video camera is a ball head mounted on the handlebar. If you're passing something interesting along the ride you can pivot the camera sideways for a panning shot. Even occasionally aim the camera back toward yourself or the road behind you.

If your camera didn't include a ball head you can find 'em on Amazon, B&H Photo and Video, Adorama and many other retailers that handle video gear.

My Ion Speed Pro included a pretty decent nylon/plastic handlebar mount with a ball head. Works pretty well for pivoting around to get different views. I don't have any samples on YouTube at the moment, mostly because my slowpoke rock bottom speed DSL service takes half an hour to upload a 1-3 minute video, and I usually save the edited videos at lower rez (you can see the compression artifacts and degradation in the gravel ride video above).

The only hindrance to the ball mount is occasionally I use a handlebar bag on a KlickFix mount, which blocks the forward view. I can record sideways or behind me, but to record straight ahead I have to mount the camera on my helmet when I'm using the handlebar bag.