应用: 百度
任务: 打开百度，进入“消息”页面，查看视频评论消息
操作步骤:
step_id: 0
action: CLICK
step_id: 1
action: CLICK
step_id: 2
action: CLICK
step_id: 3
action: CLICK
step_id: 4
action: STOP