Video not clear and the small text almost white

Hi,

I want to download this link :

;list=PL4WEkbdagHIQVbiTwos0E38VghMJA06OT

It is downloaded fine using 720p, but the video is not clear especially for the video showing white background and blue text, the screen is almost white. 

And if the author typing url in browser, it is almost not readed correctly for me.