Could you please tell me how could I make such effect with photoshop, please?
This is without effect:
and this is with the effect:
I want to know how can I make this effect of lines. Thank you!
These are called scanlines.
It's hard to tell because the attached photos are showing different content, but I think it’s just an overlay.
So all you have to do is find (or create) such a pattern and lay it on top of your image with an opacity of 10–20%.
Go to THIS image, scroll down to choose the smallest size larger than your image, remove the grey so you just have the white, overlay it on your image in a new layer, and then lower the opacity of the layer to taste.
Note: you can use any image like this, I just am giving you the one I found. If this is for commercial reasons you should check for authorization.