Question about Primewire HDMI Cable 2.1, 8K @ 120Hz / 4K @ 240Hz DSC, Ultra High Speed, Nylon Jacket, HDR, ARC

Hello

Yes, should work if the cable is no longer than 5m.

Maximum cable lengths according to resolution

Full HD (1080p): Up to 10 metres with standard HDMI cables; high-quality cables can reach up to 15 metres.
CHIP tips

4K (2160p): Lengths of up to 5 metres with high-quality HDMI 2.0 cables are recommended. Active or optical HDMI cables are required for longer distances.
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8K (4320p): Passive HDMI 2.1 cables should not exceed 3 to 5 metres. Active cables or alternative transmission technologies are required for longer distances.

No

I second Toby‘s answer: up until 5m there shouldn‘t be any loss of signal quality even in cheap cables.

No, nothing should happen at 4 metres. From 6 metres or longer, there may be a loss of sound, especially with a soundbar.