To be completely blunt. There is really no excuse to NOT put up 1080p.
480p? My first video was 480p, in 2006. Not sure it would stop me from watching, but I would either think it was ancient or shot with a flip phone.
You can debate 720p, not terrible, if I was interested I would watch the video, and probably not notice too much difference.
1080p 60fps is where it is at, and considering most of your videos will he watched on tablet and/or phone, it's all you will ever need.
4K to me, at this point, is a waste. Once ina while I will fire up my living room TV, put on youtube, and 40 minute travel video in 4K. It's relaxing, and my 4K TV is so good, it almost hurts your eyes to look its so clear. Other than that, I have never used 4K for anything. OK, fib, I watched a bikini fashion show in 4k, sue me.
Long story short, I agree with most of the posters, be patient, upload that 1080 sweetness.
BTW - Nicekid76 always brings the info. If he is posting in a thread, take notice and read it.