The 10minute warnings help sometimes. Other times they leave him more flustered and cause problems in other ways. There is no consistency with this kid!
We share a YouTube account because I find it the easiest way to monitor what/who he is watching, being able to access it from my phone. Unfortunately that means that if I use the account it moves him back to the main screen and that frustrates him. I think if he goes into the history it will let him find his place but I don't know if I want him knowing how the history works.