That convo leads me to believe it started out with Jason and Lucia sitting at the table, the gramps saw her and said to Jason "I had me a girl once" to have a lil convo about girls while taking a piss.
Leaker purposefully cut out Lucia out of the video, while also making another reference to his "leaks".
That cutscene serves him 2 purposes - he did another nod to his "leaks", while also making it clear to Us and Rockstar that he got to the point in the story where he unlocked or is about to unlock Lucia as a playable character.
EDIT: that cutscene finally led me to fully believe he has a playable build himself - not through someone of QA testers, not through old Slack dev chats, just him




