The footage and the captions created by Premiere look blurry when the video are playing

[29354358xx6k]

As you can see, when the video is not playing, the quality of the video looks fine. But once I play them, the video and the captions are super blurry. The captions are created by Premiere.

I suspect this is the setting of my sequence again. Does anyone know how to adjust it? Thanks ahead!

[Peru Bob]

Is playback quality set to full?

https://www.youtube.com/watch?v=nxsu5OGXcMw

[29354358xx6k]

Yes, it's full.

After I exported it, the subtitles look blurry as the video plays. I suspect it's the setting of my sequence, and I am wondering where to adjust. 

[Peru Bob]

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@29354358xx6k wrote:

I suspect it's the setting of my sequence, and I am wondering where to adjust. 

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https://helpx.adobe.com/premiere-pro/using/change-sequence-settings.html