@D_Rob posting printer videos online should require a minimum bit of training. 90% is out of focus, badly oriented, or using digital zoom. :/ (commenting on the video you posted…not YOUR videos…)
The video @D_Rob has put a link to clearly shows the Z lift working fine as well as the other axes working fine for the " up/down" or for both directions.
@Mike_Miller no you hit the nail on the head or you haven’t seen mine. I’m no videographer, that’s for sure.