I'm trying to create a 3d map with a moving line showing the path. All done as per the Youtube tutorial from "Imagiscope Tech". Everything up until the import into Blender works perfect. As per the video, I've imported the sequence from Earth Studio as well as the .jason file. It plays perfect, but as soon as I roll the mouse wheel to change perspective, it disappears and I have no idea where it is. What am I doing wrong.
Running Blender 2.83.0. was running 2.93.0, but it did the same thing, so thought if I used the same version as in the tutorial, it might work.

