截止到2019年1月30日，bilibili暂时没有竖屏播放的这个功能。
1、打开手机界面，点击“哔哩哔哩”图标
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2、打开后，点击“频道”选项卡，点击一个视频
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3、此时正在播放视频，点击右上角的三个点按钮
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4、在下方出现的菜单中点击“缓存”按钮
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5、在出现的菜单中，点击“缓存全部”按钮
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6、然后点击“查看缓存”按钮
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7、此时打开“离线缓存”的界面，此时看到刚刚选择的视频正在缓存中
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8、等待缓存成功后，点击这个视频
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9、就是横屏进行播放了，无法更改为竖屏播放的
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截止到2019年1月30日，bilibili暂时没有竖屏播放的这个功能。
1、打开手机界面，点击“哔哩哔哩”图标
2、打开后，点击“频道”选项卡，点击一个视频
3、此时正在播放视频，点击右上角的三个点按钮
4、在下方出现的菜单中点击“缓存”按钮
5、在出现的菜单中，点击“缓存全部”按钮
6、然后点击“查看缓存”按钮
7、此时打开“离线缓存”的界面，此时看到刚刚选择的视频正在缓存中
8、等待缓存成功后，点击这个视频
9、就是横屏进行播放了，无法更改为竖屏播放的
暂时应该还没有这种功能吧，如果是竖版拍摄的话，全屏就是竖着播放了
