It probably happens to everyone just like you are descriping. It's also
funny that if you don't bother to enter the password over and over again
and just press home button the password screen will pop up again later,
for example, while you're watchin...
I assume this problem is solely related to the transition from YouTube
Kids to regular YouTube. For me, it all started when I couldn't get my
child's YouTube to work; YouTube kept telling me to ask for a parent's
help and to log in to families.youtub...