[Galaxy Note 10.1 (2014 Edition) General] compumasta:
You do understand how mass-production works, right? Let me preface this by saying that even from your video, I cannot accurately measure how much your ir blaster cover was moving, but maybe I can help you to understand why this sort of thing occurs. Hint: it's not because of ****ty quality or quality control.

Everything that is man made has a tolerance level. With metal, such as the iPad, those tolerances can be much smaller, and therefore attain a much tighter fit and finish. However, people on here and elsewhere report returning and exchanging iPads just as often for inconsistencies in other places, such as light bleed or screen yellowing. Those too have tolerances that the factory has deemed appropriate for shipment, even though they may not align with what the more discerning customer may expect.

In terms of Samsung, they usually use plastic exteriors. Due to the nature of pliable plastic, the tolerances are not as tight as with metal. Think about it this way, when Samsung produces that cover on the IR blaster, they don't precision cut one to exact specifications and install it. They have a machine, with it's own limiting tolerances that cuts and chops likely tens of thousands per day. Those are likely sifted to remove blatantly bad parts, and the rest are used in devices. But there is also a tolerance level in the hole cut in the plastic frame. Those two tolerances must be taken together to understand fitment. I am sure that Samsung does QC check their devices, but they certainly don't do every single one. It's just not feasible when you produce millions of devices.

This is why some people will experience an IR blaster cover that fits perfect, and one that is almost perfect that moves a little. Some will also experience ones that move more than average. The same applies to the speaker grills.

I don't remember the exact specification, but most, if not all, LCD manufacturers allow for a certain number of dead or stuck pixels. I want to say that it varies by size of screen, ranging from about 3 to 10 or so. Someone can correct me if I am wrong. To me, having 5 stuck or dead pixels would likely be irritating and unacceptable in my screens, but I don't set the tolerances. I would replace the screen if this were the case, but sometimes a manufacturer will deny warranty if it falls within their allowances.

My Note 10.1 2014 exhibits very slight movement in the IR blaster shield, slight button wiggle, and no speaker grill movement. The speaker grill movement would not bother me so long as it didn't audibly rattle when sound was played. But if any of these things ever did degrade to become annoying, I would probably fix it myself instead of having a repair shop make it worse. The IR blaster could have been secured with a micro-dab of superglue and it never would have moved again. Easy fix, for those whom it annoys. same with the speaker grills as well. Buttons can be finicky, but I have yet to have any long term problems with any of my Android devices. By the way, this is my first Samsung Android product, but I love their TVs.

It is well within your right to complain and bug companies about a product that is not up to standards. Just bear in mind that what they deem acceptable and what you deem acceptable will very likely vary, and that may cause issue with some companies. In the end, you will never find a perfect device from ANY manufacturer. You will only find one that meets or exceeds YOUR standards, but there will very likely be other people for whom the device may not. It is the very nature of mass production, or any production really. Take your pick, there are tolerances in everything. Cars, houses, tech devices. The question is: What are you willing to live with?