I created the attached KML it follows a road, loaded into Google Earth it works a track and you can move along it with the timeline

Loaded into sitrec is displays a ball at the end

I exported the directions from Google earth and asked Claude to create a simple track based on it, with a set time around the middle.

I tested it by importing back into Google earth

Should be fixed now. 2.190.1

Fixed a KML track whose altitudes are heights above the ground being read as heights above sea level. A track made 5 ft above a road was drawn far under the ground. Such a track is now read as height above the terrain, and a track that the file puts on the ground is put on the terrain. A track with no altitude mode, or with parts in different modes, is read as before. A sitch saved by version 2.190.0 or earlier keeps its tracks where they were. The Select Tracks list and the Altitude Range (ft) filter now put such a track on the loaded terrain to get its altitude, and the Track Browser shows its height above the ground (#15182 "KML doesn't work as a track").

Hmm, you mean like a drone following the car? Or the camera attached to the car? Looking out the window? Or the camera a fixed position relative to the car?