I don’t believe there’s any difference in quality. It’s digital signal. It won’t degrade in a 2m cable with a cheap connector. Their output will be identical. It may break if pulled in and out a thousand times but it’s a dvd player and tv. It’ll be plugged in once and left. A cheap one will do the exact same job as a mid range and an expensive one.
Well, up to a point. By analogy, I tend to buy MK mains plugs which are slightly dearer than generic ones. They are just a bit better made and less likely to need fettling over time - eg the cord grip or loose screws. I don't get "better electricity" out of them but I feel it's worth a pound or two more as once it's on it never needs looking at again.
Admittedly they are plugged and unplugged more, but beefier phone cables do last longer than crappy ones. A bare minimum data cable might be at the edge of spec, and the software would need a bit more error correction or whatever. At work, we'd get ethernet cables and such from proper suppliers, with some element of provenance and testing associated with them. In the past I worked for a company who made RJ11 and RJ45 connectors and associated wiring cabinets and there was an immense amount of testing associated with the products despite being built to a tight cost for BT and the like. I remember my lodger, who also worked there, doing 10,000 insertions using the special tool, to check the quality.
Just to be clear, I'm not a believer in magic high fi cables for thousands of pounds or anything like that
