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Video quality

To give you the best viewing experience possible on your computer, YouTube adjusts the quality of your video stream from standard definition (such as 240p or 360p) to high definition (720p or 1080p), based on the speed of your Internet connection (bandwidth). This is why you may notice that the quality of your video changes as you watch videos.

Here are some other factors that determine video quality:

• Video player size: By default, the quality setting will be on “Auto” and YouTube will use the highest quality based on your video player size.
• Quality of the original uploaded video: For example, if the video was recorded in standard definition, it will not be available in high definition.

Change video quality

Change the video quality by going to Settings in the corner of the video player, and selecting your preferred quality.

On mobile devices, adjust quality settings by tapping Menu , then Settings . This option isn’t available on all devices (e.g. TV/game consoles), or connections (e.g. iOS on a cellular network).

Note that choosing lower video quality (such as 240p and 360p) will make videos start more quickly. The video player will remember this for future playbacks. 

最后更新：2017-05-23 04:17:05

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