If its a DVD-R it will have been finalised and once that is done the DVD cannot be altered. You can
select chapters before the disc is finalised but this is extremely time consuming which is why nobody bothers. When I finalise a DVD-R on my standalone
Panasonic DVD recorder it inserts chapters at approx
every six minutes of play time but it doesn't list them anywhere. You can progress thru the disc either
forwards or backwards using the "skip" option. i.e. the button which normally allows you to skip to the next chapter. You should be able to do this in a domestic DVD player if the disc was finalised on a standalone player going either forwards or reverse
in approx six minute periods.