on the one called teaser, I have a few tips. Sumar won't load for me.
First is stabilize it.  Even a ballhead with a panoramic base would help.  Also, don't shoot into the lights.  It creates backlight on your subject (the rider), and it messes with your exposure.  the light will be washed out, and the rest of the scene will be too dark.  On the second shot, you had it from the other side and it looked much better.  having real audio would be great, especially ramped, so if you can get a mic or something, that could take it next level.  As far as ramping, there are a lot of tutorials on youtube, I think gamers like to do it for some stuff, so you should be able to find something there (personally I don't know/haven't done it, but I may look into it now).
Try filming during the day, use a decently high shutter speed, stop down and be sure you are in focus, use something to stabilize it, and a mic if you can, then upload that.