First of all I´m not sure if this is the right board for this but it´s about wallpapers after all. I´m a noob on this topic and need an experienced anon to help me out.

I screenshotted this image of Youtube on 4k resolution and saved it as png, as apparently it is better than jpg for printing. I REALLY want to get this image made in 160x90cm format but the site says the image quality (resolution?) is too low to produce a picture this size.

What are my options here exactly? Do I need to make the picture bigger, increase resolution or something? Can I even? I mean I took the screenshot at 4k why isn´t it enough?

Thanks anons, it´s appreciated