I’ve uploaded a quick example of it in the Nick JR logo. You can see it around the characters too. It’s noticeable around everything and I’ve messed with all of the settings on the TV and the Virgin TV box. So please don’t bother telling me to change some setting because I can guarantee I’ve tried it.
The TV I have is
Philips 58 Inch 58PUS7505 Smart 4K Ultra HD LED TV
Nick JR is an SD channel, and if you're viewing it on a 4K TV, I'm not surprised the image has some issues - I'd question if that could be described as pixellation, but that's symantics.
What are your video output settings set to? You may well need to experiment with whether your V6 box only outputs in 2160 (and therefore does all the upscaling) or perhaps has the option of outputting in 1080 and the TV does the rest.
You are probably also better off by comparing with a channel that's broadcast in at least 1080 to begin with - in other words any HD channel. If you're on the Full-House/XL package, you can also try one of the 4K-UHD channels.
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