Is YouTube entering maintenance and adding new features?

It was predicted beforehandYouTubeMaintenance, but it seems that it started slightly earlier.
This is the top screen under maintenance


It seems there was a little bug, it is expressed as "to drive out gremlin". So, what is this figure shown on the maintenance screen says something, it seems to be an amateur's explanation of the site description on YouTube ... What is this ...? It seems that you can enjoy seeing this figure until maintenance is over.