Seemed to bounce back and forth a little. There wasn't really a specific flow or storyline to the video, so it seems like just a bunch of shots thrown on a timeline to music. I would suggest maybe grouping the seasonal shots together; sequence the bmx shots in line and then move to skiing, other subjects, etc.
As already stated, it may be painful, but waiting to shoot a bit more content will yield a much stronger reel down the road, so continue shooting and keep adding to it. Other than that, the actual shots look pretty good. Keep it up!