I'll do you one better. My nephew was going to a summer camp that didn't allow the kids to bring phones or tablets. He was allowed to bring an MP3 player, tho. So I downscaled a copy of Into the Spiderverse to 432x240 (his iPod Nano's native resolution). I left the bitrate quite high (1600kps) and it looks absolutely great. Even stretched out on a full sized ipad, it's completely watchable.
I have a bit of astigmatism, but I still don't wear glasses as a routine thing, and when I watch good DVDs on my 60" TV from about 8 feet away, it's fairly rare for me to be that upset by the video quality. Even after I suck some out downsampling into mp4, it's still rare for me to actively notice. DVD encoders are fairly good now.
At this point I don't care at all if something advertises a "4K" stream because I know that it's still likely to be not all that good. Tell me the bitrate of your stream, that's what I want to know. (Assuming the use of a modern codec and quality encoder.) I can get a "4K" stream with hundreds of kilobits per second. The encoder will be crying because of the shoddy job you're making it do and the decoder will look at you like you're on crack, but by golly, 4K's worth of pixels will indeed be shoveled onto the screen.
Take an average 4k Stream from YouTube/Netflix/etc and look at the transfer size for the full duration. It's gonna be something around 1-3gb per hour from my observations.
A good 4k Video is usually around 5-10x that size and with good reason, because the resolution demands a lot of bits to make it shine, no matter how well you've encoded it
What does "high quality pixel" mean?
However, if you look at a swathe of pixels, say a 16x16 chunk, you can reasonably talk about with what fidelity that set of pixels represents the original signal, whatever that original signal was. You get into the whole perceptual coding thing which tells us that determining the human-perceived accuracy of a chunk of pixels is more than just adding up the differences, but you can take that as a suitable first approximation for thought.
High-quality pixels have minimal deviation from the source material. Low-quality pixels have significant deviation.
Tom Scott has a good video where turns up and down the quality live so you can see it in a single video: https://www.youtube.com/watch?v=r6Rp-uo6HmI The video's resolution never changes, and you could say the video's bit rate never changes (it probably does because adaptive coding saves YouTube a fortune, but conceptually you could say it doesn't), but the quality of the pixels sure does.
You may have been inadvertently subverting his summer camp experience.