I ripped some DVDs, and there are lines around the video on them.
Here is a screenshot:
https://imgur.com/a/Xm5nQ81
You can see the lines, they are white apart from the left one.
On the top you can see it clearly in the sky, on the right you can see it on the sky at the top right, on the bottom you can see it in the sand on the bottom left.
And on the left for some reason it's purple and a lot more noticeable.
What are these, and can you get rid of them? It's really annoying when your watching it.
(I can upload a short clip if that would be helpful)