Thanks jonray, your tips are much appreciated.
Will look at that tool as i often do route animations. I used to use 3d animation tools (like cinema 4d) for that task where you can define a spline for the route and let an 3d object grow on the spline according to the tour.
You watched carefully: indeed, i wanted to fade the text in and out from transparent - i saw the problem but didn’t find the right solution right away! Thanks for that advice!
P.S.: i took a look into the tool and it generates a growing path on a STATIC map. I have a moving animated 3d contryside and want to animate a path through while moving on the GES side. So this task would be much more complicated and cannot be achieved with that tool i guess. Its even easier to animate a point through the video than a growing path as you always have to adjust the path for each frame exactly. For now i only see a 3d animation tool doing that, but you have to combine the GE information with the path in that tool, which is also complicated. I know there are other external KML-based tools that are more appropriate for that task. I think for now i stick with the quick and dirty solution 