It probably isn't new at all but I haven't seen it before and I don't think it features in any of the standard documentaries.
https://www.youtube.com/watch?v=_2qQT6lU_UQ
Freddie doesn't reveal anything we haven't heard before but what I like about it is that, as in the Bob Harris footage, he is in a relaxed and expansive mood. He talks quite a lot about Bohemian Rhapsody and about his songwriting and is quizzed about the 'meaning' of We Are The Champions.