shotcut (video editor) times: text box @ 4sec:24frames or 264 frames explode @ 15sec:43frames or 943 frames final = 11sec:19frames or 679 frames 679frames/60fps = 11.31666...7 or 11.317

mpv (media player) times: text box @ 4.400 seconds explode @ 15.717 seconds 11.317

Moderator note: Retimed to 683f/11.383s by extrapolating the true starting frame (empty textbox) based on the first visible textbox frame (4 characters visible)