应用: 快手
任务: 进入快手，查看首页第十五个视频，点击‘评论’
操作步骤:
step_id: 0
action: CLICK
step_id: 1
action: SWIPE
step_id: 2
action: SWIPE
step_id: 3
action: SWIPE
step_id: 4
action: SWIPE