I don’t mean the attention-grabbing shape around the cursor (in Plasma you can enable a desktop effect which does that, as your video shows, and GNOME probably has something similar). I meant that in some screencasts when the person moves the mouse, the cursor moves in a perfectly straight line, or in a perfect arc. So clearly it’s not moved by hand. Now I can imagine some explanations, e.g. that the whole presentation was first recorded with a mouse-cursor-recording-and-playback program which doesn’t record the path the mouse takes, just the origin and destination coordinates, and then the actual video was recorded while playing back the mouse movements which are now made perfect by the program as it moves the mouse from the recorded source points to the destination points, but that’s a guess, and I wonder whether anyone knows for sure.