The Chilean movie, "Madre" (2016) had diaper scenes. It was a psychological drama involving a mom, her children (one of them is autistic and had scenes wearing diapers), and a mysterious maid.
Here's Big Brother From the Philippines
YouTube - 01052010-121111.avi
The day before, they were caught peeing on the wall when all of the toilets were full; their bladder was so full that they were forced to do so.. They were forced to wear diapers and pee in it as punishment for an entire day..