Due to tolerances in home cd/dvd players, non-commercially produced CD's and DVD's will not play successfully on all devices.
Therefore, try several other DVD players.
In order to copy the DVD's using a PC, it is necessary to use appropriate DVD burning software, e.g.
Ashampoo Burning Studio Free.
WinX DVD Author.
BurnAware Free.
DeepBurner Free.
DVDStyler.
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