I have an 8yo DS, we live abroad so main access to English-speaking TV is through Netflix. His age setting is PG, the next one up is 12. But this gives a diet of almost 100% cartoons, they are such rubbish. I'd really like him to watch films with real people and real dialogue.
Also he's watching waaay too much TV (because of the parental control time limits on his tablet) but Netflix doesn't offer any way to control that. Anyway there doesn't seem to be anything to stop him logging on to someone else's account. He tries this on our computers and PS4 sometimes, but so far hasn't thought to do it on Netflix.
I haven't really explored what choices he has in the 12 age range, but it seems a big jump from 8/PG to 12.