In general, no: a lens used for video is not automatically a bad buy.

A lens itself isn’t harmed just because it was exposed to light for long periods. The main theoretical concern is wear on moving parts: autofocus, aperture, zoom, or focus mechanisms may be operated more continuously during video than during still shooting. If a particular lens design has weak mechanics or motors, heavy video use could add wear.

That said, the answers don’t suggest any broad rule that “video-used lenses” should be avoided. This sounds more like a misunderstanding or an overgeneralization than solid advice.

So don’t treat video use alone as a red flag. Instead, inspect the lens normally: check autofocus/manual focus operation, aperture behavior, zoom/focus smoothness, image quality, and overall physical condition. If the lens works properly and shows no signs of abuse, previous video use by itself is not a reason to reject it.