应用: 快手
任务: 打开快手，选择‘精选’，浏览第四个视频
操作步骤:
step_id: 0
action: CLICK
step_id: 1
action: CLICK
step_id: 2
action: SWIPE
step_id: 3
action: SWIPE
step_id: 4
action: SWIPE