When watching their taped performance at home the next morning, Mordecai and Rigby realize they must destroy the tape so that their friends don't find it and get their feelings hurt. This being ...

This would make sense as it is a reference to one of the final moments of the series finale that highlighted a VHS tape highlighting Mordecai and Rigby ... back her friends who had been trapped ...

M&RPA Movie 3: The Rise of Eggman & Cell: Triathlon Of Allies is a full feature length film recap of season 3 of the critically acclaimed "Mordecai & Rigby: Plush Adventures" series on YouTube.