Why does my phone have red lines while im watching videos or pictures?

[AC Question]

I got my LG stlylo 2 a couple weeks back but recently started noticing red annoying lines and dots all over my screen. They only appear on videos like YouTube and pictures. I used stuck pixels and burn in apps to see if that was the problem but it was not. Why am I getting these red lines?

 

[Rukbat]

It sounds as if your video and photo apps have problems. Try installing other ones.