如果您在网站上设置了一个会由用户观看视频触发的事件，那么下面哪一项定义可视为事件参数示例？

The title of the video is a specific detail about the event (video play) that provides additional context and value. Event parameters are key-value pairs that describe the event in more detail. For a video play event, the video title helps identify which video was played. The other options describe metrics (number of users) or dimensions (device used) that are typically collected automatically or through other means, rather than being a specific parameter of that particular event instance. While device used is a dimension, it's not a parameter of the video play event itself but rather a characteristic of the user or session.