I have used this option several times and it works really well. Just remember when you've completed marking your waypoints, to save the mission. Speaking from experience, it will save you time and frustration of having to start all over.
Place heading mode to Auto. This will make the drone fly looking in the direction of the next waypoint. Adjust gimbal angle to your preference for the shot you're looking for. You might want to slowdown the drone speed, this will help with the jerking movement you see in the video.
Can you share your waypoint mission plan with the group. In setup do you have straight or curved set? Put the waypoints in Auto not Custom. That's all I can think of without seeing your flight plan.
We have what's called the (Hotter than Hell) bike race near me here in Texas. I started to do some videoing of the race last year, but never got to it. Maybe this year.