First: You're a pretty smooth rider. And it makes your video better. I was nice that you rode fast enough to show off but I could still see the terrain you were riding over.
I thought it was a very good first video. I would recommend making your next video with different locations if you have access to it. Like have a cool forest shot and then transition into a really technical area or something like that.
Lastly, I think that sometime the camera following you was slow or a bit behind. and it would be cool if you could get a shot from a very long ways away.
Overall, it was really solid work and I hope to see more.