Actually, there are DVD's that hold 5 movies in a disc that can play in any DVD player..
They basically downloaded DIVX's and used to program to generate a menu etc.
So yeah, you can buy that DVD and it will play regardless if your DVD supports DIVX.
Source: I bought some![]()
Once you put more than 2-3 hours as MPEG2 the quality degrades terribly,
while its possible to put 5 hours of MPEG2 video on a DVD9 or even DVD5
the quality is going to be terrible and you probably won't want to watch them that way. As a rule of thumb, one hour for DVD5 (one layer), 2 hours for DVD9 (two layers). One can always fit a bit more using Variable Bit Rate encoding with 2 passes but not too much (as said above). Also some DVD players have trouble reading low bitrate (and very high bitrate) sources.