Why does a part of my violin D string near the bridge sound dull, quiet, and scratchy? The part farther from the bridge sounds fine, and the rest of the strings of the same brand sound fine, too.

I attached a video for reference: t=2s

The brand of the strings, I believe, is D'Addario Prelude Violin 4/4 with J810 4/4M solid steel core and medium tension.

I asked my my friend who's really good at violin said she doesn't really know and thinks it's probably just a defective string. I looked on the Internet, and most people generally have the whole string sounding bad rather than just part of it, so it's hard to find, so I wanted to ask here.