VLC Media player also has a looping functionality that is available in the GUI.
Found a question on SuperUser (answered by John T and tbenz9, see Sources below), which highlights the option.
To summarise the links (in case they go dead), by activating the 'Advanced controls' from the View menu, a A-B loop button will appear in the controls. Press this once at the start of where you want the loop and press again where you want the loop to finish. VLC will then repeat that section continuously.
Alternatively, if you want to initiate it from the command line (if you already have the times), you can do the following:
vlc movie.avi --start-time 240 --stop-time 560 --repeat
Sources: