So y'all know about #HamDashboard yeah?
github.com/VA3HDL/hamdashboard
So I put that up in place of 1 of my 2 #HamClock screens. Modified it to loop a YouTube of mine instead of his in the lower-left corner.
Then it sits looping 24x7, much of the time with the screen off.
Didn't even think about whether vid loops cache locally. Pro Tip: they do not.