This has been a thing that I've notice on rare occasions before, but haven't bothered to make a thread about it.
The same (/videos doesn't show every video) could be said about the carousel Latest on the home page also sometimes not showing content supposed to be there (that I haven't consumed yet).
Currently, holiday-specialtacular-smashing-through-the-snow doesn't show on /videos.
Perhaps not a bug, but just a case of a box that wasn't ticked or something.
Happy 1st Sunday of 2019!