Mike, please take time to read clearly the link you gave us.
Your link gives 2 ideas about "what is warranty"
There are 2 type of warranties.
The legal guarantee concerns manufacturing defects.
The commercial guarantee concerns breakdowns.
These are two completely different types of warranty and few users know how to make a difference.
To make the legal warranty work based on the DV10 Drift postulate, the customer must prove that the product is defective. To date, there is only one video whose legal legitimacy and impartiality can be defeated by any prosecutor, lawyer or notified body before court.
As said previously, check the videos in slow motion and you will find severals mistakes of measurement.
The manufacturer has now issued an erratum acknowledging there is a frequency/error stability issue, they have not quantified the error just issued a poorly worded document.
The acknowledgement that the product has an inherent manufacturing/design defect means any UK or EU customer would have no difficulty in claiming against the retailer that sold them product.
If in year 5 of ownership you found the radio drifted too much to work properly listening to a signal you could issue a claim on the retailer to replace, repair or refund the product, you need to provide no more evidence than the erratum that acknowledged the defect.
In the UK it would cost £60 to issue a small claims court claim, the retailer will lose and the costs trying to defend it would be way more than replacing the product.
Retailers need to get a grip, some think they can wriggle out of their obligations with BS.