I know buffering is used, but it implies that the video is getting downloaded still, but what about a video that's already downloaded and keeps pausing for some reason. What adjective would you use to qualify such a video?
2 Answers
You can use the adjective choppy.
Example of use in https://www.makeuseof.com/tag/play-video-smoothly-pc:
Watching choppy video playback is like sailing choppy waters: rough, frightening, and may lead to nausea.
You can use the adjective jerky. Example of use in this StackOverflow question:
The video plays but it's really jerky.