[QUOTE=voltron902;2309108]I’m having the exact same problem. My movies get to about the 30 minute mark and then go back to the beginning of the movie. I’m using Nero and Winavi for conversion. I’m using Dataware DVD+Rs. The strange thing is, a lot of the movies I’ve burned in the past have worked maybe once or twice, then they’d do what I said above. Is it the software? The DVD+Rs? My DVD player? I really can’t figure this one out.[/QUOTE]
Perhaps the guys above aren’t stating this clearly enough 
Memorex Media is commonly crap media. They buy cheap crap from china (from whichever company is cheapest today) & stick a memorex sticker on it. 
The problems you are experiencing correspond with the same symptoms that many people experience, or have experienced over the last 5 years of DVD burning - you are not alone 
It’s a common misconception that discs will burn better at low speeds. This is incorrect, except in the case of Laptop drives (which are usually crap burners).
16x Media should rarely be burned at less than 8x speed, although in rare cases (with older drives) you might go back to 4x or 6x because you have a very old burner that can’t burn them at a decent speed.
Newer DVD writers should likely burn 16x rated DVD’s at 12x or 16x …
[QUOTE=Antarius;1654837]The DVD works perfectly on my computer and on other computers.
So it’s either my DVD player that is probably the problem or I just need to burn at a slower speed. One thing I need to to do is to try it on a different but newer DVD player and see what happens[/QUOTE]
PC optical drives are generally much better READERS than drives in standalone players, Car players, portable jukeboxes & etc.
A good quality disc will have a very low error rate. A bad quality disc will have a high error rate - however a single read error does NOT mean that the DVD will result in a unreadable error.
PC’s have the OS to defend against read errors, or take measures to counteract read errors, besides computer desktop drives being better readers, whereas standalones do not.
However, you can use programs to measure the errors on any particular disc, getting the information straight from the drive, and bypassing much of the OS.
Low quality discs will often had ZONES of bad quality material, and this results in an unreadable error in this area.
Worse … the materials used for these discs can degrade quite quickly … Nasty, eh? It’s almost a crime against humanity 
Good quality discs have consistency across the entire disc -and although they may have read errors, they are limited, and will not prevent reconstruction of the data by the reader 
Buy good discs … you’ll be saving time, money, and the environment 