Druiaghtagh, you don't give any context in which you imagine the phrases being used. As Einstein says, where the phrase is used in the objective case - for example when using 'between' - it should be 'you and
me'. However, where the phrase is nominative, it should be 'you and I', as in, for example: "You and I are going to fall out over this!"..."You and I were made for each other" and so forth.
Out of sheer politeness, rather than grammatical correctness, it is usual to put the other person first, as I did in the last two examples. Hence, 'me and you' is still - in my opinion (but then, I'm getting on) - a no-no in any circumstances. As the other earlier answer said, however, language belongs to the people who use it, As a result, none of us says: "I" when - after we've knocked on a door - the occupant shouts: "Who is it?" We all say: "Me", despite the fact that that is grammatically incorrect.