Many thanks to @WittyTV for tweeting their link and to Sabrina for sending it to me and to @Leelueblue who alerted me on twitter.!
Witty TV has posted a clip of Keanu Reeves backstage meeting the family after the show. There is also footage of him backstage before he was announced and some shots of him on stage. The clip is here. I’ll update if anything else appears.
Update: There is a second video but it is geoblocked in the states. I have no way to know for sure but I am assuming that only those in Italy are able to see it.
It is here for those who can see it.