Here's a video on YouTube I just found now of a boy supposedly going poop in his diaper under his Pajamas.
He does look like he's wearing a diaper and he says new diaper in the description.
Either way it's a great video.
I wish that were my kid I would change him into a new diaper and keep him in diapers all the time.
Here's the Kids YouTube channel it does look like he loves wearing diapers as well from some of his other videos.
He has a few other videos of diapers on him and about diapers on his YouTube channel.
Shane Luper is his name on YouTube