ytmgr: ffmpeg's -shortest changed behaviour
ytmgr: ffmpeg's -shortest changed behaviour

codl/eqbeats,eqbeats/eqbeats,SuperStarPL/eqbeats,eqbeats/eqbeats,SuperStarPL/eqbeats,eqbeats/eqbeats,SuperStarPL/eqbeats,SuperStarPL/eqbeats,codl/eqbeats,eqbeats/eqbeats,codl/eqbeats,codl/eqbeats,codl/eqbeats,SuperStarPL/eqbeats,codl/eqbeats,eqbeats/eqbeats,eqbeats/eqbeats,SuperStarPL/eqbeats