I don't think they have the footage. The girls spend 100% of their time at the mansion and they are only filmed, getting date cards, on dates or at the cocktail party. They don't get filmed when they are just hanging about.They may never show the footage of what went down, but based on the girls' discussion right now while the others are out on a group date, it's pretty obvious that those things were said and almost everyone heard.
Obviously the girls need to vent and express their frank opinions about Matt. You’d think off camera discussions would be off the record.
it's funny how the girls seem to get emma's hopes up that she'll get the single date only to get dashed each time.