Chuckanut
Give me a museum and I'll fill it. (Picasso) Give me a forum ...
Interesting. Our '07 Prius has an oil-change light that starts blinking at 4500 miles and glows steadily at startup around 5K. I usually get the oil changed before the reminder progresses to a steady glow.
The sump holds less than 4 quarts -- not much oil for an extended oil-change interval. On a Prius-specific forum I'm subscribed to (PriusChat), it's not uncommon to encounter threads about oil consumption in Generation 2 Priuses, as well as cures to clean out clogged oil rings on the pistons. I believe that's the condition the YouTube guy points out -- the clogging seizes up the oil rings, which causes them to wear down the cylinder bores.
Toyota also says the transmission fluid in the Prius is a lifetime fill, IIRC. I change mine every 50K. I think it's good protection. The transmission holds only a few quarts.
Hmm.... 50% of the time the engine is running? I'm not sure of that but I have nothing but my empirical observation to rely on.
I do wish automobile engines would also display their running time like we see with aircraft and and other ICE powered equipment. I suppose that is probably stashed away in the car's computer.