Kallen, Harley's suggestion is a good one. The quickest thing to do would be to use CDSpeed/DVDInfoPro or Plextools Pro (if you have a plextor 712 or 716) to perform a Read Transfer test. If your read curve is smooth, then the burn was good. However, I suspect if you run that test that you'll find huge dips downward where the movie skips, and you'll hear and see your drive speed lower to try to read the disk. This is the quickest way. Otherwise, if you have a burner (please list the burner you use to burn with) that will allow CDSpeed or DVDInfoPro to let you test with it, run the Disk Quality test, which would provide at least the PIE (sum 8) and PIF values (sum 1) and possibly the jitter (if your burner lets the software recognize it). PIE values higher than 280 could point to possible skipping and PIF values higher than 4 (on LiteOn and Plextor drives) could also reflect that. For BenQ and NEC drives, the PIF value would have to be above 16 to possibly indicate skipping...
Please report back and post those tests when you have run them. 