It depends on the camera and how it was used, so there isn’t a universal rule.

Heavy stills use mainly adds wear to mechanical parts like the shutter and mirror. Heavy video use generally reduces that kind of mechanical wear, but it can increase heat exposure for the sensor and electronics because they run continuously for much longer.

In practice, the main concern with video use is heat, not shutter wear. Cameras that record video are designed for this, and many limit clip length partly to protect themselves, so normal video use is not automatically a problem. Some people worry about dead pixels or sensor/electronics stress, but that’s not a clear reason by itself to reject a camera.

So when buying used, “never used for video” is not a reliable advantage on its own. Video use is neither clearly good nor clearly bad without knowing the model and the actual condition of the camera. Between two bodies, overall condition, reliability, and how the specific model handles heat matter more than a simple video/no-video label.