ETA: Full video can be
viewed here.
Screenshots by
mastersofflorence_ (Instagram story, which lasts 24 hours) on 24 September 2018. They are presumably from RAI1 TV (Italy) who were broadcasting the first of the Medici BTS videos today, according to
this post. Hopefully the actual video(s) will surface soon.
This has been added to our
Medici Masterpost, here.