in 1080p both your video and that example show the same kind of artifacts. Its a matter of compression, your whole frame changes every single frame. You perceive the other video being crispy clean in either static frames (like the end letterings) or scenes that have a lot of black, thus leaving the compressor with more data to work on things that are actually moving/changing.
Vimeo has a better output than youtube. Also your video in 1080p looks alright, I can see the compression you’re mentioning but its still ok.