MMX
Although many popular films and TV shows don’t seem to use the convention of using roman numeralsin their copyright statements anymore, the BBChas, as far as I’m aware, always consistently used them. It used to be kind of fun to see who could figure out the roman numerals first, although my wife was always better at it. For anything made since 2000 (MM) of course, it’s become a bit boring, since you only need to know how to count to 10.